diff --git a/.github/workflows/regression.yml b/.github/workflows/regression.yml
index 6388c912d2..04b6a6267b 100644
--- a/.github/workflows/regression.yml
+++ b/.github/workflows/regression.yml
@@ -16,6 +16,8 @@ concurrency:
 
 on:
   pull_request:
+    # Re-run when Graphite changes only the PR base for the same head SHA.
+    types: [opened, synchronize, reopened, edited]
   push:
     branches:
       - main