diff --git a/.github/workflows/check-submodule-pointers.yml b/.github/workflows/check-submodule-pointers.yml
index f4683b3..b25edc5 100644
--- a/.github/workflows/check-submodule-pointers.yml
+++ b/.github/workflows/check-submodule-pointers.yml
@@ -4,6 +4,8 @@ on:
   workflow_dispatch:
   push:
     branches: [ main ]
+  pull_request:
+    branches: [ main ]
   schedule:
     - cron: '42 12 * * *'
 
@@ -20,6 +22,7 @@ jobs:
         run: |
             CODEQL_ACTUAL_SHA="$(git rev-parse @:./ql)"
             CODEQL_EXPECTED_SHA="$(gh api repos/github/codeql/git/ref/heads/lgtm.com --jq '.object.sha')"
+            echo "The ql submodule currently points to $CODEQL_ACTUAL_SHA. The tip of the lgtm.com branch of github/codeql is $CODEQL_EXPECTED_SHA."
             if [ "$CODEQL_EXPECTED_SHA" != "$CODEQL_ACTUAL_SHA" ]; then 
               echo "::error:: The ql submodule is out of date with the lgtm.com branch of github/codeql. Expected $CODEQL_EXPECTED_SHA, found $CODEQL_ACTUAL_SHA."
               exit 1
@@ -27,6 +30,7 @@ jobs:
 
             CODEQL_GO_ACTUAL_SHA="$(git rev-parse @:./codeql-go)"
             CODEQL_GO_EXPECTED_SHA="$(gh api repos/github/codeql-go/git/ref/heads/lgtm.com --jq '.object.sha')"
+            echo "The codeql-go submodule currently points to $CODEQL_GO_ACTUAL_SHA. The tip of the lgtm.com branch of github/codeql-go is $CODEQL_GO_EXPECTED_SHA."
             if [ "$CODEQL_GO_EXPECTED_SHA" != "$CODEQL_GO_ACTUAL_SHA" ]; then 
               echo "::error:: The codeql-go submodule is out of date with the lgtm.com branch of github/codeql-go. Expected $CODEQL_GO_EXPECTED_SHA, found $CODEQL_GO_ACTUAL_SHA."
               exit 1