diff --git a/.github/workflows/compare-annotation.yml b/.github/workflows/compare-annotation.yml
index 8a19db1..abfea9e 100644
--- a/.github/workflows/compare-annotation.yml
+++ b/.github/workflows/compare-annotation.yml
@@ -6,6 +6,8 @@ on:
   push:
     branches:
       - master
+  pull_request:
+    branches: [ master ]
 jobs:
   build:
     if: github.repository == 'oncokb/oncokb-annotator'
diff --git a/.github/workflows/compare-genomic-change-annotation.yml b/.github/workflows/compare-genomic-change-annotation.yml
index 1d12fb2..0f5d7b4 100644
--- a/.github/workflows/compare-genomic-change-annotation.yml
+++ b/.github/workflows/compare-genomic-change-annotation.yml
@@ -6,6 +6,8 @@ on:
   push:
     branches:
       - master
+  pull_request:
+    branches: [ master ]
 jobs:
   build:
     if: github.repository == 'oncokb/oncokb-annotator'