diff --git a/.github/workflows/mutation-tests-diff.yml b/.github/workflows/mutation-tests-diff.yml
new file mode 100644
index 000000000..8a49fa7c5
--- /dev/null
+++ b/.github/workflows/mutation-tests-diff.yml
@@ -0,0 +1,42 @@
+# https://help.github.com/en/categories/automating-your-workflow-with-github-actions
+
+name: "Mutation tests on diff"
+
+on:
+    pull_request:
+
+jobs:
+    mutation-tests-diff:
+        name: "Mutation tests on diff"
+
+        runs-on: ${{ matrix.operating-system }}
+
+        strategy:
+            matrix:
+                dependencies:
+                    - "locked"
+                php-version:
+                    - "8.3"
+                operating-system:
+                    - "ubuntu-latest"
+
+        steps:
+            - name: "Checkout"
+              uses: actions/checkout@v4
+              with:
+                fetch-depth: 0
+
+            - name: "Install PHP"
+              uses: "shivammathur/setup-php@2.29.0"
+              with:
+                  coverage: "pcov"
+                  php-version: "${{ matrix.php-version }}"
+                  ini-values: memory_limit=-1
+                  extensions: pdo_sqlite
+
+            - uses: ramsey/composer-install@2.2.0
+              with:
+                  dependency-versions: ${{ matrix.dependencies }}
+
+            - name: "Infection"
+              run: "vendor/bin/roave-infection-static-analysis-plugin --git-diff-lines --git-diff-base=origin/$GITHUB_BASE_REF --ignore-msi-with-no-mutations --only-covered --min-msi=80 --min-covered-msi=100"
diff --git a/.github/workflows/mutation-tests.yml b/.github/workflows/mutation-tests.yml
index 1d4d6ebf1..9598f2a73 100644
--- a/.github/workflows/mutation-tests.yml
+++ b/.github/workflows/mutation-tests.yml
@@ -44,38 +44,3 @@ jobs:
               run: "vendor/bin/roave-infection-static-analysis-plugin"
               env:
                   STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
-
-    mutation-tests-diff:
-        name: "Mutation tests on diff"
-
-        runs-on: ${{ matrix.operating-system }}
-
-        strategy:
-            matrix:
-                dependencies:
-                    - "locked"
-                php-version:
-                    - "8.3"
-                operating-system:
-                    - "ubuntu-latest"
-
-        steps:
-            - name: "Checkout"
-              uses: actions/checkout@v4
-
-            - name: "Install PHP"
-              uses: "shivammathur/setup-php@2.29.0"
-              with:
-                  coverage: "pcov"
-                  php-version: "${{ matrix.php-version }}"
-                  ini-values: memory_limit=-1
-                  extensions: pdo_sqlite
-
-            - uses: ramsey/composer-install@2.2.0
-              with:
-                  dependency-versions: ${{ matrix.dependencies }}
-
-            - name: "Infection"
-              run: "vendor/bin/roave-infection-static-analysis-plugin --git-diff-lines --git-diff-base=origin/$GITHUB_BASE_REF --ignore-msi-with-no-mutations --only-covered --min-msi=80 --min-covered-msi=100"
-              env:
-                  STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}