diff --git a/.appveyor.yml b/.appveyor.yml
index 4c5a7f9ee..b0740b1ac 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -6,6 +6,7 @@ init:
 # Uncomment previous line to get RDP access during the build.
 
 environment:
+  COVERAGE_CORE: sysmon
   EXECUTABLE: python.exe
   TEST_OPTIONS:
   DEPLOY: YES
diff --git a/.github/workflows/test-cygwin.yml b/.github/workflows/test-cygwin.yml
index 2615fb427..4526b9454 100644
--- a/.github/workflows/test-cygwin.yml
+++ b/.github/workflows/test-cygwin.yml
@@ -26,6 +26,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  COVERAGE_CORE: sysmon
+
 jobs:
   build:
     runs-on: windows-latest
diff --git a/.github/workflows/test-mingw.yml b/.github/workflows/test-mingw.yml
index 1c6d15b77..b4e479f12 100644
--- a/.github/workflows/test-mingw.yml
+++ b/.github/workflows/test-mingw.yml
@@ -26,6 +26,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  COVERAGE_CORE: sysmon
+
 jobs:
   build:
     runs-on: windows-latest
diff --git a/.github/workflows/test-windows.yml b/.github/workflows/test-windows.yml
index 79a2e60b2..d3d1eeaa3 100644
--- a/.github/workflows/test-windows.yml
+++ b/.github/workflows/test-windows.yml
@@ -26,6 +26,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  COVERAGE_CORE: sysmon
+
 jobs:
   build:
     runs-on: windows-latest
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 19f4a6dae..643273e58 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,6 +27,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
+  COVERAGE_CORE: sysmon
   FORCE_COLOR: 1
 
 jobs: