diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f33faba..9a78c00 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -22,6 +22,7 @@ jobs:
         python-version: [ "3.10", "3.11", "3.12", "3.13", "3.14", "3.15" ]
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      COVERAGE_PYTHON_VERSION: "3.14"
     steps:
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
@@ -40,11 +41,20 @@ jobs:
         run: |
           make lint
 
+      # coverage only runs on one version: before 3.14 it traces with sys.settrace, which slows the tests down
+      # several times and makes the timing-sensitive tests flaky. 3.14+ uses sys.monitoring (PEP 669).
       - name: Run tests
+        if: matrix.python-version != env.COVERAGE_PYTHON_VERSION
+        run: |
+          make test
+
+      - name: Run tests with coverage
+        if: matrix.python-version == env.COVERAGE_PYTHON_VERSION
         run: |
           make test-coverage
 
       - name: Report coverage
+        if: matrix.python-version == env.COVERAGE_PYTHON_VERSION
         run: |
           make coveralls