diff --git a/.github/workflows/slack-notifications.yml b/.github/workflows/slack-notifications.yml
index 969d8b067e..1ae927ac0c 100644
--- a/.github/workflows/slack-notifications.yml
+++ b/.github/workflows/slack-notifications.yml
@@ -114,13 +114,18 @@ jobs:
 
             // Find the workflow run for the commit that immediately preceded this one.
             for ( let i = 0; i < previous_runs.data.workflow_runs.length; i++ ) {
-              // Protects against false notifications when contributors use similar head_ref names.
-              if ( previous_runs.data.workflow_runs[ i ].event !== "push" ) {
-                continue;
-              }
-
               if ( previous_runs.data.workflow_runs[ i ].run_number == workflow_run.data.run_number ) {
-                return previous_runs.data.workflow_runs[ i + 1 ].conclusion;
+                let next_index = i;
+                do {
+                  next_index++;
+
+                  // Protects against a false notification when contributors use the trunk branch as the pull request head_ref.
+                  if ( previous_runs.data.workflow_runs[ next_index ].event !== "push" ) {
+                    continue;
+                  }
+
+                  return previous_runs.data.workflow_runs[ next_index ].conclusion;
+                } while ( next_index < previous_runs.data.workflow_runs.length );
               }
             }