diff --git a/.github/workflows/results-regression.yml b/.github/workflows/results-regression.yml
index b9f7045..b591c9b 100644
--- a/.github/workflows/results-regression.yml
+++ b/.github/workflows/results-regression.yml
@@ -1,6 +1,13 @@
 name: Tekton Results regression
 
 on:
+  pull_request:
+    paths:
+      - ".github/workflows/results-regression.yml"
+      - "scripts/install-postgres-kind.sh"
+      - "scripts/install-tekton-results.sh"
+      - "scripts/run-regression-agent-full.sh"
+      - "scripts/run-lang-unit-tests.sh"
   workflow_dispatch:
   schedule:
     # Weekly strict Results/Postgres evidence on the default branch.
diff --git a/libs/tekton-dag-common/tests/test_m17_results_automation.py b/libs/tekton-dag-common/tests/test_m17_results_automation.py
index 6fd3411..28a565f 100644
--- a/libs/tekton-dag-common/tests/test_m17_results_automation.py
+++ b/libs/tekton-dag-common/tests/test_m17_results_automation.py
@@ -10,6 +10,8 @@ def test_results_workflow_is_scheduled_strict_and_retains_diagnostics():
 
     assert "workflow_dispatch:" in workflow
     assert "schedule:" in workflow
+    assert "pull_request:" in workflow
+    assert '".github/workflows/results-regression.yml"' in workflow
     assert "run-regression-agent-full.sh" in workflow
     assert "install-postgres-kind.sh --ephemeral" in workflow
     assert "install-tekton-results.sh" in workflow