diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index 0923396b..15c2bf83 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -1,10 +1,16 @@
 name: Unit Tests
 
-on: [push]
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - main
 
 jobs:
   unit-tests:
-
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.event.pull_request.base.repo.full_name
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
diff --git a/ChangeLog.md b/ChangeLog.md
index e9bfc80c..eab4a218 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -13,6 +13,7 @@ Starting with v1.31.6, this file will contain a record of major features and upd
 - Excluded certain `itables` versions causing errors in query magics ([PR #1](https://github.com/aws/graph-notebook/pull/429)) ([PR #2](https://github.com/aws/graph-notebook/pull/429))
 - Pinned version ceiling for all dependencies ([Link to PR](https://github.com/aws/graph-notebook/pull/431))
 - Truncated metadata request/query time metrics ([Link to PR](https://github.com/aws/graph-notebook/pull/425))
+- Enabled unit test workflow runs for external pull requests ([Link to PR](https://github.com/aws/graph-notebook/pull/437))
 
 ## Release 3.7.0 (December 7, 2022)
 - Added Neo4J section to `%%graph_notebook_config` ([Link to PR](https://github.com/aws/graph-notebook/pull/331))