diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c2207247..60370694 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -4,7 +4,9 @@ on:
   push:
     branches: [master]
   pull_request:
-    branches: [master]
+    path:
+      - umap/*
+      - pyproject.toml
 
 jobs:
   tests: