diff --git a/.github/workflows/test-changed.yml b/.github/workflows/test-changed.yml
index 923b63e8586..26501630c1c 100644
--- a/.github/workflows/test-changed.yml
+++ b/.github/workflows/test-changed.yml
@@ -26,6 +26,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          # Fetch all Git history so that the build:changed script can use diffs
+          fetch-depth: 0
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'