diff --git a/.github/workflows/e2e_testing.yml b/.github/workflows/e2e_testing.yml
index 84ddcf4f..fe395940 100644
--- a/.github/workflows/e2e_testing.yml
+++ b/.github/workflows/e2e_testing.yml
@@ -13,14 +13,20 @@ on:
         description: 'Test case to run (see e2e_test_cases.yaml for available cases), "all" to run all test cases.'
         required: false
         default: 'all'
+      commitish_to_test:
+        type: string
+        description: 'Enter commit hash or branch to test (default: main).'
+        default: "main"
 
 jobs:
-  determine_test_cases:
+  parse_inputs:
     runs-on: ubuntu-latest
+    if: contains(github.event.pull_request.labels.*.name, 'test:e2e') || github.event_name == 'push' || github.event_name == 'workflow_dispatch'
     outputs:
-      test_cases: ${{ steps.set-matrix.outputs.test_cases }}
+      test_cases: ${{ steps.parse-test-cases.outputs.test_cases }}
+      commitish_to_test: ${{ steps.parse-commitish-to-test.outputs.commitish_to_test }}
     steps:
-      - id: set-matrix
+      - id: parse-test-cases
         run: |
           if [ "${{ github.event_name }}" = "workflow_dispatch" ] && [ "${{ github.event.inputs.test_case }}" != "all" ]; then
             echo "test_cases=[\"${{ github.event.inputs.test_case }}\"]" >> $GITHUB_OUTPUT
@@ -29,15 +35,21 @@ jobs:
             echo 'test_cases=["basic", "synchropasef", "astral", "astral_automatic_calibration", "multistep"]' >> $GITHUB_OUTPUT
           fi
 
-  end2end_testing:
-    name: End to end test
-    needs: determine_test_cases
+      - id: parse-commitish-to-test
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            echo "commitish_to_test=[\"${{ github.event.inputs.commitish_to_test }}\"]" >> $GITHUB_OUTPUT
+          else
+            echo "commitish_to_test=main" >> $GITHUB_OUTPUT
+
+  end2end_tests:
+    name: End to end tests
+    needs: parse_inputs
     runs-on: self-hosted
-    if: contains(github.event.pull_request.labels.*.name, 'test:e2e') || github.event_name == 'push' || github.event_name == 'workflow_dispatch'
     strategy:
       fail-fast: false
       matrix:
-        test_case: ${{ fromJson(needs.determine_test_cases.outputs.test_cases) }}
+        test_case: ${{ fromJson(needs.parse_inputs.outputs.test_cases) }}
     env:
       RUN_NAME: alphadia-${{github.sha}}-${{github.run_id}}-${{github.run_attempt}}
       BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
@@ -49,6 +61,8 @@ jobs:
       TQDM_MININTERVAL: 10  # avoid lots of tqdm outputs
     steps:
       - uses: actions/checkout@v4
+        with:
+          ref: ${{ needs.parse_inputs.outputs.commitish_to_test }}
       - name: Pip installation (stable)
         id: pip_installation
         shell: bash -el {0}