From dcb08510dc34d043a6d11d3a66bc81e3b42b8275 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Wed, 28 Jan 2026 14:27:37 -0600
Subject: [PATCH 01/38] PYTHON-5467 Add codecov integration

---
 .evergreen/config.yml                      |  1 +
 .evergreen/generated_configs/functions.yml | 17 ++++++++++++
 .evergreen/scripts/generate_config.py      | 12 +++++++++
 .evergreen/scripts/upload-codecov.sh       | 15 +++++++++++
 .github/workflows/test-python.yml          | 31 ++++++++++++++++++++++
 5 files changed, 76 insertions(+)
 create mode 100755 .evergreen/scripts/upload-codecov.sh

diff --git a/.evergreen/config.yml b/.evergreen/config.yml
index 91fa442775..1af19857c1 100644
--- a/.evergreen/config.yml
+++ b/.evergreen/config.yml
@@ -38,6 +38,7 @@ post:
   # Disabled, causing timeouts
   # - func: "upload working dir"
   - func: "teardown system"
+  - func: "upload codecov"
   - func: "upload coverage"
   - func: "upload mo artifacts"
   - func: "upload test results"
diff --git a/.evergreen/generated_configs/functions.yml b/.evergreen/generated_configs/functions.yml
index bd983abb3e..6f0612da95 100644
--- a/.evergreen/generated_configs/functions.yml
+++ b/.evergreen/generated_configs/functions.yml
@@ -252,6 +252,23 @@ functions:
           - TOOLCHAIN_VERSION
       type: test
 
+  # Upload coverage codecov
+  upload codecov:
+    - command: ec2.assume_role
+      params:
+        role_arn: ${assume_role_arn}
+      type: setup
+    - command: subprocess.exec
+      params:
+        binary: bash
+        args:
+          - .evergreen/scripts/upload-codecov.sh
+        working_dir: src
+        silent: true
+        include_expansions_in_env:
+          - CODECOV_TOKEN
+      type: test
+
   # Upload coverage
   upload coverage:
     - command: ec2.assume_role
diff --git a/.evergreen/scripts/generate_config.py b/.evergreen/scripts/generate_config.py
index 04579c521f..25658296a3 100644
--- a/.evergreen/scripts/generate_config.py
+++ b/.evergreen/scripts/generate_config.py
@@ -1077,6 +1077,18 @@ def create_upload_coverage_func():
     return "upload coverage", [get_assume_role(), cmd]
 
 
+def create_upload_coverage_codecov_func():
+    # Upload the coverage report to codecov.
+    include_expansions = ["CODECOV_TOKEN"]
+    args = [
+        ".evergreen/scripts/upload-codecov.sh",
+    ]
+    upload_cmd = get_subprocess_exec(
+        silent=True, include_expansions_in_env=include_expansions, args=args
+    )
+    return "upload codecov", [get_assume_role(), upload_cmd]
+
+
 def create_download_and_merge_coverage_func():
     include_expansions = ["AWS_ACCESS_KEY_ID", "AWS_SECRET_ACCESS_KEY", "AWS_SESSION_TOKEN"]
     args = [
diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
new file mode 100755
index 0000000000..995c9391e1
--- /dev/null
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+# Upload a coverate report to codecov.
+# See coverage job in .github/workflows/test-python.yml for more information.
+set -eu
+
+curl -Os https://cli.codecov.io/latest/linux/codecov
+curl -Os https://cli.codecov.io/latest/linux/codecov.SHA256SUM
+shasum -a 256 -c codecov.SHA256SUM
+sudo chmod +x codecov
+./codecov upload-process \
+  --report-type test_results \
+  --disable-search \
+  --fail-on-error \
+  --token ${CODECOV_TOKEN} \
+  --file .coverage
diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index 086e22faec..74fa83e875 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -79,6 +79,37 @@ jobs:
       - name: Run tests
         run: uv run --extra test pytest -v
 
+  coverage:
+    # This enables a coverage report for a given PR, which will be augmented by
+    # the combined codecov report uploaded in Evergreen.
+    runs-on: ubuntu-latest
+
+    name: Coverage
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+      - name: Install uv
+        uses: astral-sh/setup-uv@61cb8a9741eeb8a550a1b8544337180c0fc8476b # v7
+        with:
+          enable-cache: true
+          python-version: "3.10"
+      - id: setup-mongodb
+        uses: mongodb-labs/drivers-evergreen-tools@master
+        with:
+          version: "8.0"
+      - name: Install just
+        run: uv tool install rust-just
+      - name: Setup tests
+        run: COVERAGE=1 just setup-tests
+      - name: Run tests
+        run: just run-tests
+      - name: Upload test results to Codecov
+        uses: codecov/test-results-action@v1
+        with:
+          disable_search: true
+          files: .coverage
+          token: ${{ secrets.CODECOV_TOKEN }}
   doctest:
     runs-on: ubuntu-latest
     name: DocTest

From 2a3678582ef5bc81abf02b7424ad3fba0bad5be3 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Wed, 28 Jan 2026 14:55:42 -0600
Subject: [PATCH 02/38] fix coverage target

---
 .github/workflows/test-python.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index 74fa83e875..dbdb9d54a6 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -105,8 +105,9 @@ jobs:
       - name: Run tests
         run: just run-tests
       - name: Upload test results to Codecov
-        uses: codecov/test-results-action@v1
+        uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
         with:
+          report_type: test_results
           disable_search: true
           files: .coverage
           token: ${{ secrets.CODECOV_TOKEN }}

From 2b714fe0f4d1c8521ede82ce9a2b7d14e0845296 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Wed, 28 Jan 2026 15:05:29 -0600
Subject: [PATCH 03/38] add codecov config

---
 .codecov.yml | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .codecov.yml

diff --git a/.codecov.yml b/.codecov.yml
new file mode 100644
index 0000000000..2e8a95c34d
--- /dev/null
+++ b/.codecov.yml
@@ -0,0 +1,5 @@
+comment:  # this is a top-level key
+  layout: " diff, flags, files"
+  behavior: default
+  require_changes: true
+  require_base: false

From a1a464f255cbd12f48824e0b1a65a682ecad57e2 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Wed, 28 Jan 2026 15:43:56 -0600
Subject: [PATCH 04/38] generate xml report

---
 .evergreen/scripts/setup_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 939423ffcc..0971c56d9e 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -458,7 +458,7 @@ def handle_test_env() -> None:
         # Keep in sync with combine-coverage.sh.
         # coverage >=5 is needed for relative_files=true.
         UV_ARGS.append("--group coverage")
-        TEST_ARGS = f"{TEST_ARGS} --cov"
+        TEST_ARGS = f"{TEST_ARGS} --cov --cov-report=xml"
         write_env("COVERAGE")
 
     if opts.green_framework:

From 90aea18fa3ebebd294243d1cd1a6771585e38f24 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 07:18:56 -0600
Subject: [PATCH 05/38] allow search to find coverage file

---
 .github/workflows/test-python.yml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index dbdb9d54a6..e241791be9 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -108,8 +108,6 @@ jobs:
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
         with:
           report_type: test_results
-          disable_search: true
-          files: .coverage
           token: ${{ secrets.CODECOV_TOKEN }}
   doctest:
     runs-on: ubuntu-latest

From 285ee75f0f031908c7a13f31b12651d2637e6355 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 07:54:10 -0600
Subject: [PATCH 06/38] fix handling of codecov

---
 .evergreen/generated_configs/functions.yml |  6 ++++++
 .evergreen/scripts/generate_config.py      | 12 ++++++++++--
 .evergreen/scripts/upload-codecov.sh       | 18 ++++++++++++++++--
 3 files changed, 32 insertions(+), 4 deletions(-)

diff --git a/.evergreen/generated_configs/functions.yml b/.evergreen/generated_configs/functions.yml
index 6f0612da95..2ebddbdb02 100644
--- a/.evergreen/generated_configs/functions.yml
+++ b/.evergreen/generated_configs/functions.yml
@@ -267,6 +267,12 @@ functions:
         silent: true
         include_expansions_in_env:
           - CODECOV_TOKEN
+          - build_variant
+          - task_name
+          - github_commit
+          - github_pr_number
+          - github_pr_head_branch
+          - github_author
       type: test
 
   # Upload coverage
diff --git a/.evergreen/scripts/generate_config.py b/.evergreen/scripts/generate_config.py
index 25658296a3..14f3600806 100644
--- a/.evergreen/scripts/generate_config.py
+++ b/.evergreen/scripts/generate_config.py
@@ -1078,8 +1078,16 @@ def create_upload_coverage_func():
 
 
 def create_upload_coverage_codecov_func():
-    # Upload the coverage report to codecov.
-    include_expansions = ["CODECOV_TOKEN"]
+    # Upload the coverage xml report to codecov.
+    include_expansions = [
+        "CODECOV_TOKEN",
+        "build_variant",
+        "task_name",
+        "github_commit",
+        "github_pr_number",
+        "github_pr_head_branch",
+        "github_author",
+    ]
     args = [
         ".evergreen/scripts/upload-codecov.sh",
     ]
diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 995c9391e1..b8b63fb2da 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -1,8 +1,18 @@
 #!/bin/bash
 # Upload a coverate report to codecov.
-# See coverage job in .github/workflows/test-python.yml for more information.
 set -eu
 
+if [ -z "${github_pr_number:-}" ]; then
+  echo "This is not a PR, not running codecov"
+  exit 0
+fi
+
+if [ ! -f "xunit-results/TEST-results.xml" ]; then
+  echo "There are no XML test results, not running codecov"
+  exit 0
+fi
+
+# TODO: handle linux and windows.
 curl -Os https://cli.codecov.io/latest/linux/codecov
 curl -Os https://cli.codecov.io/latest/linux/codecov.SHA256SUM
 shasum -a 256 -c codecov.SHA256SUM
@@ -12,4 +22,8 @@ sudo chmod +x codecov
   --disable-search \
   --fail-on-error \
   --token ${CODECOV_TOKEN} \
-  --file .coverage
+  --pr ${github_pr_number} \
+  --sha "${github_commit}" \
+  --branch "${github_author}:${github_pr_head_branch}" \
+  --flag "${build_variant}-${task_name}" \
+  --file xunit-results/TEST-results.xml

From e01d66a71d9c8b099756b075a392d4594aef67dd Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 08:29:20 -0600
Subject: [PATCH 07/38] debug

---
 .evergreen/generated_configs/functions.yml | 4 ----
 .evergreen/scripts/generate_config.py      | 2 +-
 .evergreen/scripts/upload-codecov.sh       | 3 ++-
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/.evergreen/generated_configs/functions.yml b/.evergreen/generated_configs/functions.yml
index 2ebddbdb02..d3f63f3b42 100644
--- a/.evergreen/generated_configs/functions.yml
+++ b/.evergreen/generated_configs/functions.yml
@@ -254,10 +254,6 @@ functions:
 
   # Upload coverage codecov
   upload codecov:
-    - command: ec2.assume_role
-      params:
-        role_arn: ${assume_role_arn}
-      type: setup
     - command: subprocess.exec
       params:
         binary: bash
diff --git a/.evergreen/scripts/generate_config.py b/.evergreen/scripts/generate_config.py
index 14f3600806..a6f034cff2 100644
--- a/.evergreen/scripts/generate_config.py
+++ b/.evergreen/scripts/generate_config.py
@@ -1094,7 +1094,7 @@ def create_upload_coverage_codecov_func():
     upload_cmd = get_subprocess_exec(
         silent=True, include_expansions_in_env=include_expansions, args=args
     )
-    return "upload codecov", [get_assume_role(), upload_cmd]
+    return "upload codecov", [upload_cmd]
 
 
 def create_download_and_merge_coverage_func():
diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index b8b63fb2da..c5e127f2c6 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
+# shellcheck disable=SC2154
 # Upload a coverate report to codecov.
-set -eu
+set -eux
 
 if [ -z "${github_pr_number:-}" ]; then
   echo "This is not a PR, not running codecov"

From 399ad55256784bb09266ae686661725b5d545c24 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 09:10:02 -0600
Subject: [PATCH 08/38] debug

---
 .evergreen/scripts/upload-codecov.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index c5e127f2c6..ff6b3eb6d3 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -3,6 +3,8 @@
 # Upload a coverate report to codecov.
 set -eux
 
+echo "Inside upload-codecov script"
+
 if [ -z "${github_pr_number:-}" ]; then
   echo "This is not a PR, not running codecov"
   exit 0

From a307de8b7a1726532e9b7fe17007ab49399bc9a7 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 10:32:08 -0600
Subject: [PATCH 09/38] dibug

---
 .evergreen/generated_configs/functions.yml |  1 -
 .evergreen/scripts/generate_config.py      |  4 +---
 .evergreen/scripts/upload-codecov.sh       | 14 +++++++++-----
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/.evergreen/generated_configs/functions.yml b/.evergreen/generated_configs/functions.yml
index d3f63f3b42..6fcda5e985 100644
--- a/.evergreen/generated_configs/functions.yml
+++ b/.evergreen/generated_configs/functions.yml
@@ -260,7 +260,6 @@ functions:
         args:
           - .evergreen/scripts/upload-codecov.sh
         working_dir: src
-        silent: true
         include_expansions_in_env:
           - CODECOV_TOKEN
           - build_variant
diff --git a/.evergreen/scripts/generate_config.py b/.evergreen/scripts/generate_config.py
index a6f034cff2..4c72078e07 100644
--- a/.evergreen/scripts/generate_config.py
+++ b/.evergreen/scripts/generate_config.py
@@ -1091,9 +1091,7 @@ def create_upload_coverage_codecov_func():
     args = [
         ".evergreen/scripts/upload-codecov.sh",
     ]
-    upload_cmd = get_subprocess_exec(
-        silent=True, include_expansions_in_env=include_expansions, args=args
-    )
+    upload_cmd = get_subprocess_exec(include_expansions_in_env=include_expansions, args=args)
     return "upload codecov", [upload_cmd]
 
 
diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index ff6b3eb6d3..32a401c6a9 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -1,32 +1,36 @@
 #!/bin/bash
 # shellcheck disable=SC2154
 # Upload a coverate report to codecov.
-set -eux
+set -eu
 
-echo "Inside upload-codecov script"
+FNAME=xunit-results/TEST-results.xml
 
 if [ -z "${github_pr_number:-}" ]; then
   echo "This is not a PR, not running codecov"
   exit 0
 fi
 
-if [ ! -f "xunit-results/TEST-results.xml" ]; then
+if [ ! -f "$FNAME" ]; then
   echo "There are no XML test results, not running codecov"
   exit 0
 fi
 
 # TODO: handle linux and windows.
+echo "Installing codecov..."
 curl -Os https://cli.codecov.io/latest/linux/codecov
 curl -Os https://cli.codecov.io/latest/linux/codecov.SHA256SUM
 shasum -a 256 -c codecov.SHA256SUM
 sudo chmod +x codecov
+echo "Installing codecov... done."
+echo "Uploading $FNAME..."
 ./codecov upload-process \
   --report-type test_results \
   --disable-search \
   --fail-on-error \
   --token ${CODECOV_TOKEN} \
   --pr ${github_pr_number} \
-  --sha "${github_commit}" \
+  --sha ${github_commit} \
   --branch "${github_author}:${github_pr_head_branch}" \
   --flag "${build_variant}-${task_name}" \
-  --file xunit-results/TEST-results.xml
+  --file $FNAME
+echo "Uploading $FNAME... done."

From 2383ce02f2c5e74bceabe87525a0b7cf770c042f Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 10:54:28 -0600
Subject: [PATCH 10/38] fix bin handling

---
 .evergreen/scripts/upload-codecov.sh | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 32a401c6a9..c01fe8fa20 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -15,15 +15,17 @@ if [ ! -f "$FNAME" ]; then
   exit 0
 fi
 
-# TODO: handle linux and windows.
-echo "Installing codecov..."
+echo "Installing uv..."
+export PYMONGO_BIN_DIR=bin
+bash $HERE/install-dependencies.sh
 curl -Os https://cli.codecov.io/latest/linux/codecov
 curl -Os https://cli.codecov.io/latest/linux/codecov.SHA256SUM
 shasum -a 256 -c codecov.SHA256SUM
 sudo chmod +x codecov
-echo "Installing codecov... done."
+echo "Installing uv... done."
+
 echo "Uploading $FNAME..."
-./codecov upload-process \
+$PYMONGO_BIN_DIR/uv tool run --from codecov-cli codecovcli upload-process \
   --report-type test_results \
   --disable-search \
   --fail-on-error \

From 36571a9c2d9b57c78c6c9dbd4ff8f7ef640d1692 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 11:21:48 -0600
Subject: [PATCH 11/38] fix dir handling

---
 .evergreen/scripts/upload-codecov.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index c01fe8fa20..bb1248f8f9 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -3,6 +3,10 @@
 # Upload a coverate report to codecov.
 set -eu
 
+HERE=$(dirname ${BASH_SOURCE:-$0})
+ROOT=$(dirname "$(dirname $HERE)")
+
+push $ROOT > /dev/null
 FNAME=xunit-results/TEST-results.xml
 
 if [ -z "${github_pr_number:-}" ]; then
@@ -36,3 +40,5 @@ $PYMONGO_BIN_DIR/uv tool run --from codecov-cli codecovcli upload-process \
   --flag "${build_variant}-${task_name}" \
   --file $FNAME
 echo "Uploading $FNAME... done."
+
+popd > /dev/null

From 3c6318e85619d7a64dbbd3b608b5cfe1c51c279b Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 12:03:38 -0600
Subject: [PATCH 12/38] try with do-upload

---
 .evergreen/scripts/upload-codecov.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index bb1248f8f9..9634ec8859 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -29,7 +29,7 @@ sudo chmod +x codecov
 echo "Installing uv... done."
 
 echo "Uploading $FNAME..."
-$PYMONGO_BIN_DIR/uv tool run --from codecov-cli codecovcli upload-process \
+$PYMONGO_BIN_DIR/uv tool run --from codecov-cli codecovcli do-upload \
   --report-type test_results \
   --disable-search \
   --fail-on-error \

From 84782443e1dc20fd99a77c2274e529eb2c5a52e4 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 13:05:40 -0600
Subject: [PATCH 13/38] fix pushd

---
 .evergreen/scripts/upload-codecov.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 9634ec8859..9c2f46f6b5 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -6,8 +6,8 @@ set -eu
 HERE=$(dirname ${BASH_SOURCE:-$0})
 ROOT=$(dirname "$(dirname $HERE)")
 
-push $ROOT > /dev/null
-FNAME=xunit-results/TEST-results.xml
+pushd $ROOT > /dev/null
+export FNAME=xunit-results/TEST-results.xml
 
 if [ -z "${github_pr_number:-}" ]; then
   echo "This is not a PR, not running codecov"

From 375c0dc0ba4785e5e6bd998b0be80329444f4312 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 13:05:53 -0600
Subject: [PATCH 14/38] simplify

---
 .evergreen/scripts/upload-codecov.sh | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 9c2f46f6b5..c3054e9e9f 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -22,10 +22,6 @@ fi
 echo "Installing uv..."
 export PYMONGO_BIN_DIR=bin
 bash $HERE/install-dependencies.sh
-curl -Os https://cli.codecov.io/latest/linux/codecov
-curl -Os https://cli.codecov.io/latest/linux/codecov.SHA256SUM
-shasum -a 256 -c codecov.SHA256SUM
-sudo chmod +x codecov
 echo "Installing uv... done."
 
 echo "Uploading $FNAME..."

From 80c763211e83e47385dd280570a3672eeba4e96e Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 13:23:31 -0600
Subject: [PATCH 15/38] debug

---
 .evergreen/scripts/upload-codecov.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index c3054e9e9f..1995b93f67 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -21,7 +21,9 @@ fi
 
 echo "Installing uv..."
 export PYMONGO_BIN_DIR=bin
+set -x
 bash $HERE/install-dependencies.sh
+set +x
 echo "Installing uv... done."
 
 echo "Uploading $FNAME..."

From bf68f3dcd8ec0c6df981428c2e9ca8fcec97df6d Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 13:58:44 -0600
Subject: [PATCH 16/38] try uv directly

---
 .evergreen/scripts/upload-codecov.sh | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 1995b93f67..236396c9e9 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -19,15 +19,8 @@ if [ ! -f "$FNAME" ]; then
   exit 0
 fi
 
-echo "Installing uv..."
-export PYMONGO_BIN_DIR=bin
-set -x
-bash $HERE/install-dependencies.sh
-set +x
-echo "Installing uv... done."
-
 echo "Uploading $FNAME..."
-$PYMONGO_BIN_DIR/uv tool run --from codecov-cli codecovcli do-upload \
+uv tool run --from codecov-cli codecovcli do-upload \
   --report-type test_results \
   --disable-search \
   --fail-on-error \

From 8afc9d7c60ea499ae3665315de3ed4ecb6f707f5 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 20:17:14 -0600
Subject: [PATCH 17/38] upload coverage.xml

---
 .evergreen/scripts/upload-codecov.sh | 6 +++---
 .github/workflows/test-python.yml    | 2 ++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 236396c9e9..bfff15a7ef 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -7,7 +7,7 @@ HERE=$(dirname ${BASH_SOURCE:-$0})
 ROOT=$(dirname "$(dirname $HERE)")
 
 pushd $ROOT > /dev/null
-export FNAME=xunit-results/TEST-results.xml
+export FNAME=coverage.xml
 
 if [ -z "${github_pr_number:-}" ]; then
   echo "This is not a PR, not running codecov"
@@ -19,7 +19,7 @@ if [ ! -f "$FNAME" ]; then
   exit 0
 fi
 
-echo "Uploading $FNAME..."
+echo "Uploading $FNAME to sha ${github_commit}..."
 uv tool run --from codecov-cli codecovcli do-upload \
   --report-type test_results \
   --disable-search \
@@ -30,6 +30,6 @@ uv tool run --from codecov-cli codecovcli do-upload \
   --branch "${github_author}:${github_pr_head_branch}" \
   --flag "${build_variant}-${task_name}" \
   --file $FNAME
-echo "Uploading $FNAME... done."
+echo "Uploading $FNAME ${github_commit}... done."
 
 popd > /dev/null
diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index e241791be9..a04301c3ed 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -108,6 +108,8 @@ jobs:
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
         with:
           report_type: test_results
+          disable_search: true
+          files: coverage.xml
           token: ${{ secrets.CODECOV_TOKEN }}
   doctest:
     runs-on: ubuntu-latest

From f8b74259ddbd8bc8e71656b0674798a4d4bc6f64 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 20:17:52 -0600
Subject: [PATCH 18/38] update gitignore

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 74ed0bbb70..cb4940a55e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,4 +41,5 @@ test/lambda/*.json
 
 # test results and logs
 xunit-results/
+coverage.xml
 server.log

From 77083057e3222af33d98f345d7cc61a876d73ae6 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 20:41:35 -0600
Subject: [PATCH 19/38] produce legacy file

---
 .evergreen/scripts/setup_tests.py    | 3 ++-
 .evergreen/scripts/upload-codecov.sh | 8 +++++---
 .github/workflows/test-python.yml    | 2 +-
 .gitignore                           | 2 +-
 4 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 0971c56d9e..5a7ef367d6 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -458,7 +458,8 @@ def handle_test_env() -> None:
         # Keep in sync with combine-coverage.sh.
         # coverage >=5 is needed for relative_files=true.
         UV_ARGS.append("--group coverage")
-        TEST_ARGS = f"{TEST_ARGS} --cov --cov-report=xml"
+        # Generate coverage report compatible with codecov.io.
+        TEST_ARGS = f"{TEST_ARGS} --cov -junitxml=junit.xml -o junit_family=legacy"
         write_env("COVERAGE")
 
     if opts.green_framework:
diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index bfff15a7ef..8055b0167f 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -7,7 +7,7 @@ HERE=$(dirname ${BASH_SOURCE:-$0})
 ROOT=$(dirname "$(dirname $HERE)")
 
 pushd $ROOT > /dev/null
-export FNAME=coverage.xml
+export FNAME=junit.xml
 
 if [ -z "${github_pr_number:-}" ]; then
   echo "This is not a PR, not running codecov"
@@ -19,7 +19,8 @@ if [ ! -f "$FNAME" ]; then
   exit 0
 fi
 
-echo "Uploading $FNAME to sha ${github_commit}..."
+echo "Uploading..."
+set -x
 uv tool run --from codecov-cli codecovcli do-upload \
   --report-type test_results \
   --disable-search \
@@ -30,6 +31,7 @@ uv tool run --from codecov-cli codecovcli do-upload \
   --branch "${github_author}:${github_pr_head_branch}" \
   --flag "${build_variant}-${task_name}" \
   --file $FNAME
-echo "Uploading $FNAME ${github_commit}... done."
+set +x
+echo "Uploading...done."
 
 popd > /dev/null
diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index a04301c3ed..b86366afd7 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -109,7 +109,7 @@ jobs:
         with:
           report_type: test_results
           disable_search: true
-          files: coverage.xml
+          files: junit.xml
           token: ${{ secrets.CODECOV_TOKEN }}
   doctest:
     runs-on: ubuntu-latest
diff --git a/.gitignore b/.gitignore
index cb4940a55e..16202b05a1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,5 +41,5 @@ test/lambda/*.json
 
 # test results and logs
 xunit-results/
-coverage.xml
+junit.xml
 server.log

From c77b3c9916c57b2673cd3aadf46004d8a9c7403a Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 20:45:28 -0600
Subject: [PATCH 20/38] fix coverage param

---
 .evergreen/scripts/setup_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 5a7ef367d6..35b01eaa17 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -459,7 +459,7 @@ def handle_test_env() -> None:
         # coverage >=5 is needed for relative_files=true.
         UV_ARGS.append("--group coverage")
         # Generate coverage report compatible with codecov.io.
-        TEST_ARGS = f"{TEST_ARGS} --cov -junitxml=junit.xml -o junit_family=legacy"
+        TEST_ARGS = f"{TEST_ARGS} --cov --junitxml=junit.xml -o junit_family=legacy"
         write_env("COVERAGE")
 
     if opts.green_framework:

From deafed1f6076289f2210ca6557456d5ef2f77117 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Thu, 29 Jan 2026 21:03:35 -0600
Subject: [PATCH 21/38] specify cov

---
 .evergreen/scripts/setup_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 35b01eaa17..515db6b860 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -459,7 +459,7 @@ def handle_test_env() -> None:
         # coverage >=5 is needed for relative_files=true.
         UV_ARGS.append("--group coverage")
         # Generate coverage report compatible with codecov.io.
-        TEST_ARGS = f"{TEST_ARGS} --cov --junitxml=junit.xml -o junit_family=legacy"
+        TEST_ARGS = f"{TEST_ARGS} --cov pymongo --cov bson --cov gridfs --junitxml=junit.xml -o junit_family=legacy"
         write_env("COVERAGE")
 
     if opts.green_framework:

From fb06afae81450150b58fe9e9786daf13218b3807 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 06:18:23 -0600
Subject: [PATCH 22/38] generate xml with coverage command

---
 .evergreen/scripts/setup_tests.py    | 3 +--
 .evergreen/scripts/upload-codecov.sh | 3 ++-
 .github/workflows/test-python.yml    | 4 +++-
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 515db6b860..939423ffcc 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -458,8 +458,7 @@ def handle_test_env() -> None:
         # Keep in sync with combine-coverage.sh.
         # coverage >=5 is needed for relative_files=true.
         UV_ARGS.append("--group coverage")
-        # Generate coverage report compatible with codecov.io.
-        TEST_ARGS = f"{TEST_ARGS} --cov pymongo --cov bson --cov gridfs --junitxml=junit.xml -o junit_family=legacy"
+        TEST_ARGS = f"{TEST_ARGS} --cov"
         write_env("COVERAGE")
 
     if opts.green_framework:
diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 8055b0167f..6373f3f427 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -7,7 +7,7 @@ HERE=$(dirname ${BASH_SOURCE:-$0})
 ROOT=$(dirname "$(dirname $HERE)")
 
 pushd $ROOT > /dev/null
-export FNAME=junit.xml
+export FNAME=coverage.xml
 
 if [ -z "${github_pr_number:-}" ]; then
   echo "This is not a PR, not running codecov"
@@ -21,6 +21,7 @@ fi
 
 echo "Uploading..."
 set -x
+uv tool run coverage xml -o $FNAME
 uv tool run --from codecov-cli codecovcli do-upload \
   --report-type test_results \
   --disable-search \
diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index b86366afd7..d2bd45c2ac 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -104,12 +104,14 @@ jobs:
         run: COVERAGE=1 just setup-tests
       - name: Run tests
         run: just run-tests
+      - name: Generate the coverage report
+        run: uv tool run coverage xml -o coverage.xml
       - name: Upload test results to Codecov
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
         with:
           report_type: test_results
           disable_search: true
-          files: junit.xml
+          files: coverage.xml
           token: ${{ secrets.CODECOV_TOKEN }}
   doctest:
     runs-on: ubuntu-latest

From f6ef2f3c88796f4a028be655eee72d0952a0e5a9 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 06:33:34 -0600
Subject: [PATCH 23/38] fix coverage gen

---
 .evergreen/scripts/upload-codecov.sh | 2 +-
 .github/workflows/test-python.yml    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 6373f3f427..f6d1e768e4 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -21,7 +21,7 @@ fi
 
 echo "Uploading..."
 set -x
-uv tool run coverage xml -o $FNAME
+uv tool run --with "coverage[toml]" coverage xml -o $FNAME
 uv tool run --from codecov-cli codecovcli do-upload \
   --report-type test_results \
   --disable-search \
diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index d2bd45c2ac..9e84671f18 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -105,7 +105,7 @@ jobs:
       - name: Run tests
         run: just run-tests
       - name: Generate the coverage report
-        run: uv tool run coverage xml -o coverage.xml
+        run: uv tool run --with "coverage[toml]"" coverage xml -o coverage.xml
       - name: Upload test results to Codecov
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
         with:

From 90ec59245c2d9c129702005244b86e842de07617 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 06:51:26 -0600
Subject: [PATCH 24/38] fix coverage gen

---
 .github/workflows/test-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index 9e84671f18..c4274f5298 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -105,7 +105,7 @@ jobs:
       - name: Run tests
         run: just run-tests
       - name: Generate the coverage report
-        run: uv tool run --with "coverage[toml]"" coverage xml -o coverage.xml
+        run: uv tool run --with "coverage[toml]" coverage xml -o coverage.xml
       - name: Upload test results to Codecov
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
         with:

From 3f43d3380ec671a3348806921403f798791adf84 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 07:23:33 -0600
Subject: [PATCH 25/38] try with default settings

---
 .github/workflows/test-python.yml | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index c4274f5298..60e0c68a8a 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -104,15 +104,8 @@ jobs:
         run: COVERAGE=1 just setup-tests
       - name: Run tests
         run: just run-tests
-      - name: Generate the coverage report
-        run: uv tool run --with "coverage[toml]" coverage xml -o coverage.xml
       - name: Upload test results to Codecov
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
-        with:
-          report_type: test_results
-          disable_search: true
-          files: coverage.xml
-          token: ${{ secrets.CODECOV_TOKEN }}
   doctest:
     runs-on: ubuntu-latest
     name: DocTest

From 4824a885b03eebebd1cd7630982889be7d7f3fbf Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 07:41:32 -0600
Subject: [PATCH 26/38] try again

---
 .evergreen/scripts/setup_tests.py    | 2 +-
 .evergreen/scripts/upload-codecov.sh | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 939423ffcc..6643260595 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -458,7 +458,7 @@ def handle_test_env() -> None:
         # Keep in sync with combine-coverage.sh.
         # coverage >=5 is needed for relative_files=true.
         UV_ARGS.append("--group coverage")
-        TEST_ARGS = f"{TEST_ARGS} --cov"
+        TEST_ARGS = f"{TEST_ARGS} --cov=./ --cov-report=xml"
         write_env("COVERAGE")
 
     if opts.green_framework:
diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index f6d1e768e4..dad4b27c91 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -21,7 +21,6 @@ fi
 
 echo "Uploading..."
 set -x
-uv tool run --with "coverage[toml]" coverage xml -o $FNAME
 uv tool run --from codecov-cli codecovcli do-upload \
   --report-type test_results \
   --disable-search \

From c5f6356055b93a2bd86a37bdf20f69fe4e49e054 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 07:59:29 -0600
Subject: [PATCH 27/38] add flag config

---
 .codecov.yml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/.codecov.yml b/.codecov.yml
index 2e8a95c34d..91f9dd6829 100644
--- a/.codecov.yml
+++ b/.codecov.yml
@@ -3,3 +3,12 @@ comment:  # this is a top-level key
   behavior: default
   require_changes: true
   require_base: false
+flag_management:
+  default_rules: # the rules that will be followed for any flag added, generally
+    carryforward: true
+    statuses:
+      - type: project
+        target: auto
+        threshold: 1%
+      - type: patch
+        target: 90%

From 446a4384add945276eae4d3247ddbd77a6e97b44 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 08:34:57 -0600
Subject: [PATCH 28/38] try setting the git server

---
 .evergreen/scripts/upload-codecov.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index dad4b27c91..1cbaa28ae7 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -25,6 +25,7 @@ uv tool run --from codecov-cli codecovcli do-upload \
   --report-type test_results \
   --disable-search \
   --fail-on-error \
+  --git-service github \
   --token ${CODECOV_TOKEN} \
   --pr ${github_pr_number} \
   --sha ${github_commit} \

From b717d0b422dc4119e496f16a0e82d75dca1e8f03 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 09:17:21 -0600
Subject: [PATCH 29/38] fix evg report

---
 .evergreen/scripts/upload-codecov.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 1cbaa28ae7..70c99e862d 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -21,8 +21,8 @@ fi
 
 echo "Uploading..."
 set -x
-uv tool run --from codecov-cli codecovcli do-upload \
-  --report-type test_results \
+uv tool run --from codecov-cli codecovcli upload-process \
+  --report-type coverage \
   --disable-search \
   --fail-on-error \
   --git-service github \

From 84ba8e4efc920f1299f3e967aa4f38f758d149be Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 09:49:24 -0600
Subject: [PATCH 30/38] fix evg report

---
 .evergreen/combine-coverage.sh | 2 +-
 .gitignore                     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.evergreen/combine-coverage.sh b/.evergreen/combine-coverage.sh
index 5f04f72adb..ea2be9d2a1 100755
--- a/.evergreen/combine-coverage.sh
+++ b/.evergreen/combine-coverage.sh
@@ -13,4 +13,4 @@ source .venv/bin/activate
 ls -la coverage/
 
 coverage combine coverage/coverage.*
-coverage html -d htmlcov
+coverage html --source=./ -d htmlcov
diff --git a/.gitignore b/.gitignore
index 16202b05a1..cb4940a55e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,5 +41,5 @@ test/lambda/*.json
 
 # test results and logs
 xunit-results/
-junit.xml
+coverage.xml
 server.log

From c2a8c29d73d240d7b373603d174f75f8b50dd657 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 12:18:13 -0600
Subject: [PATCH 31/38] use explicit cov args

---
 .evergreen/combine-coverage.sh       | 2 +-
 .evergreen/scripts/setup_tests.py    | 2 +-
 .evergreen/scripts/upload-codecov.sh | 7 +++++--
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/.evergreen/combine-coverage.sh b/.evergreen/combine-coverage.sh
index ea2be9d2a1..5f04f72adb 100755
--- a/.evergreen/combine-coverage.sh
+++ b/.evergreen/combine-coverage.sh
@@ -13,4 +13,4 @@ source .venv/bin/activate
 ls -la coverage/
 
 coverage combine coverage/coverage.*
-coverage html --source=./ -d htmlcov
+coverage html -d htmlcov
diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 6643260595..15bf1e703c 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -458,7 +458,7 @@ def handle_test_env() -> None:
         # Keep in sync with combine-coverage.sh.
         # coverage >=5 is needed for relative_files=true.
         UV_ARGS.append("--group coverage")
-        TEST_ARGS = f"{TEST_ARGS} --cov=./ --cov-report=xml"
+        TEST_ARGS = f"{TEST_ARGS} --cov=pymongo --cov=gridfs --cov=bson --cov-report=xml"
         write_env("COVERAGE")
 
     if opts.green_framework:
diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 70c99e862d..b1622be8c0 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -20,7 +20,11 @@ if [ ! -f "$FNAME" ]; then
 fi
 
 echo "Uploading..."
-set -x
+printf 'pr: %s\n' "$github_pr_number"
+printf 'sha: %s\n' "$github_commit"
+printf 'branch: %s:%s\n' "$github_author" "$github_pr_head_branch"
+printf 'flag: %s-%s\n' "$build_variant" "$task_name"
+printf 'file: %s\n' "$FNAME"
 uv tool run --from codecov-cli codecovcli upload-process \
   --report-type coverage \
   --disable-search \
@@ -32,7 +36,6 @@ uv tool run --from codecov-cli codecovcli upload-process \
   --branch "${github_author}:${github_pr_head_branch}" \
   --flag "${build_variant}-${task_name}" \
   --file $FNAME
-set +x
 echo "Uploading...done."
 
 popd > /dev/null

From ae5904a5a415e06c59b94109d8e78cb78f6714dc Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 15:23:16 -0600
Subject: [PATCH 32/38] cleanup

---
 .codecov.yml                      | 14 --------------
 .evergreen/scripts/setup_tests.py |  2 +-
 pyproject.toml                    |  6 +++++-
 3 files changed, 6 insertions(+), 16 deletions(-)
 delete mode 100644 .codecov.yml

diff --git a/.codecov.yml b/.codecov.yml
deleted file mode 100644
index 91f9dd6829..0000000000
--- a/.codecov.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-comment:  # this is a top-level key
-  layout: " diff, flags, files"
-  behavior: default
-  require_changes: true
-  require_base: false
-flag_management:
-  default_rules: # the rules that will be followed for any flag added, generally
-    carryforward: true
-    statuses:
-      - type: project
-        target: auto
-        threshold: 1%
-      - type: patch
-        target: 90%
diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 15bf1e703c..1def6750c4 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -458,7 +458,7 @@ def handle_test_env() -> None:
         # Keep in sync with combine-coverage.sh.
         # coverage >=5 is needed for relative_files=true.
         UV_ARGS.append("--group coverage")
-        TEST_ARGS = f"{TEST_ARGS} --cov=pymongo --cov=gridfs --cov=bson --cov-report=xml"
+        TEST_ARGS = f"{TEST_ARGS} --cov=./"
         write_env("COVERAGE")
 
     if opts.green_framework:
diff --git a/pyproject.toml b/pyproject.toml
index 65cbeca8b4..acc9fa5b0d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -239,7 +239,11 @@ dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?)|dummy.*)$"
 
 [tool.coverage.run]
 branch = true
-source = ["pymongo", "bson", "gridfs" ]
+include = [
+    "pymongo/*",
+    "bson/*",
+    "gridfs/*"
+]
 relative_files = true
 
 [tool.coverage.report]

From 66afe8c6bbef9dacd761703b00cbbf169b8225b6 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 15:34:28 -0600
Subject: [PATCH 33/38] fix cov usage

---
 .evergreen/scripts/setup_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 1def6750c4..939423ffcc 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -458,7 +458,7 @@ def handle_test_env() -> None:
         # Keep in sync with combine-coverage.sh.
         # coverage >=5 is needed for relative_files=true.
         UV_ARGS.append("--group coverage")
-        TEST_ARGS = f"{TEST_ARGS} --cov=./"
+        TEST_ARGS = f"{TEST_ARGS} --cov"
         write_env("COVERAGE")
 
     if opts.green_framework:

From d6cc0dc4f0bbc4704feb95108d76b0d25c4ff06a Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 16:20:50 -0600
Subject: [PATCH 34/38] fix cov usage

---
 .evergreen/scripts/upload-codecov.sh | 1 +
 .github/workflows/test-python.yml    | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index b1622be8c0..090dcae25b 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -25,6 +25,7 @@ printf 'sha: %s\n' "$github_commit"
 printf 'branch: %s:%s\n' "$github_author" "$github_pr_head_branch"
 printf 'flag: %s-%s\n' "$build_variant" "$task_name"
 printf 'file: %s\n' "$FNAME"
+uv tool run coverage xml
 uv tool run --from codecov-cli codecovcli upload-process \
   --report-type coverage \
   --disable-search \
diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index 60e0c68a8a..d8d90ec112 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -104,6 +104,8 @@ jobs:
         run: COVERAGE=1 just setup-tests
       - name: Run tests
         run: just run-tests
+      - name: Generate xml report
+        run: uv tool run coverage xml
       - name: Upload test results to Codecov
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
   doctest:

From ae533d2bdc9ad617e2f8ca23a1534f144310a9ee Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 16:46:53 -0600
Subject: [PATCH 35/38] fix cov usage

---
 .evergreen/scripts/upload-codecov.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index 090dcae25b..d23e466980 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -25,7 +25,7 @@ printf 'sha: %s\n' "$github_commit"
 printf 'branch: %s:%s\n' "$github_author" "$github_pr_head_branch"
 printf 'flag: %s-%s\n' "$build_variant" "$task_name"
 printf 'file: %s\n' "$FNAME"
-uv tool run coverage xml
+uv tool run --with "coverage[toml]" coverage xml
 uv tool run --from codecov-cli codecovcli upload-process \
   --report-type coverage \
   --disable-search \

From 6f19bf021bf17488f9d6b22143ad03bda6090c36 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 17:02:19 -0600
Subject: [PATCH 36/38] fix cov usage

---
 .github/workflows/test-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index d8d90ec112..5c0bbe08eb 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -105,7 +105,7 @@ jobs:
       - name: Run tests
         run: just run-tests
       - name: Generate xml report
-        run: uv tool run coverage xml
+        run: uv tool run --with "coverage[toml]" coverage xml
       - name: Upload test results to Codecov
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
   doctest:

From f4036fd008aef79db098223d41c82fb719431ce4 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 17:17:27 -0600
Subject: [PATCH 37/38] fix cov usage

---
 .evergreen/scripts/upload-codecov.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.evergreen/scripts/upload-codecov.sh b/.evergreen/scripts/upload-codecov.sh
index d23e466980..a7fdb03711 100755
--- a/.evergreen/scripts/upload-codecov.sh
+++ b/.evergreen/scripts/upload-codecov.sh
@@ -14,7 +14,7 @@ if [ -z "${github_pr_number:-}" ]; then
   exit 0
 fi
 
-if [ ! -f "$FNAME" ]; then
+if [ ! -f ".coverage" ]; then
   echo "There are no XML test results, not running codecov"
   exit 0
 fi

From 46d4dee2deb33dd9c964968917233ed365527ade Mon Sep 17 00:00:00 2001
From: Steven Silvester <steve.silvester@mongodb.com>
Date: Fri, 30 Jan 2026 17:34:17 -0600
Subject: [PATCH 38/38] try increasing bson coverage

---
 .evergreen/scripts/generate_config.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.evergreen/scripts/generate_config.py b/.evergreen/scripts/generate_config.py
index 4c72078e07..6eb33741cc 100644
--- a/.evergreen/scripts/generate_config.py
+++ b/.evergreen/scripts/generate_config.py
@@ -318,7 +318,7 @@ def create_green_framework_variants():
 def create_no_c_ext_variants():
     host = DEFAULT_HOST
     tasks = [".test-standard"]
-    expansions = dict()
+    expansions = dict(COVERAGE=1)
     handle_c_ext(C_EXTS[0], expansions)
     display_name = get_variant_name("No C Ext", host)
     return [create_variant(tasks, display_name, host=host)]