diff --git a/review-enrichment/src/analyzers/actions-pin.ts b/review-enrichment/src/analyzers/actions-pin.ts
index 6aa9fdbe79..d6a7324883 100644
--- a/review-enrichment/src/analyzers/actions-pin.ts
+++ b/review-enrichment/src/analyzers/actions-pin.ts
@@ -9,6 +9,10 @@ const FULL_SHA = /^[0-9a-f]{40}$/;
 const OFFICIAL = /^(actions|github)\//;
 const WORKFLOW_PATH = /^\.github\/workflows\/.+\.ya?ml$/;
 
+function isWorkflowPath(path: string): boolean {
+  return WORKFLOW_PATH.test(path.replace(/\\/g, "/").toLowerCase());
+}
+
 /** Scan one workflow patch's added lines for unpinned third-party `uses:` refs, line-cited via hunk headers. Pure. */
 export function scanWorkflowPins(
   path: string,
@@ -46,7 +50,7 @@ export async function scanActionPins(
 ): Promise<ActionPinFinding[]> {
   const findings: ActionPinFinding[] = [];
   for (const file of req.files ?? []) {
-    if (WORKFLOW_PATH.test(file.path) && file.patch) {
+    if (isWorkflowPath(file.path) && file.patch) {
       findings.push(...scanWorkflowPins(file.path, file.patch));
     }
   }
diff --git a/review-enrichment/test/actions-pin.test.ts b/review-enrichment/test/actions-pin.test.ts
index 0c25cb035e..57021e0936 100644
--- a/review-enrichment/test/actions-pin.test.ts
+++ b/review-enrichment/test/actions-pin.test.ts
@@ -118,3 +118,29 @@ test("scanActionPins scans only changed workflow YAML files with patches", async
     },
   ]);
 });
+
+test("scanActionPins matches workflow paths case-insensitively", async () => {
+  const findings = await scanActionPins({
+    repoFullName: "o/r",
+    prNumber: 1,
+    files: [
+      {
+        path: ".github/Workflows/CI.YML",
+        patch: "@@ -1,0 +5,1 @@\n+    - uses: pnpm/action-setup@v3",
+      },
+      {
+        path: "docs/workflow.yml",
+        patch: "@@ -1,0 +1,1 @@\n+    - uses: vendor/not-a-workflow@main",
+      },
+    ],
+  });
+
+  assert.deepEqual(findings, [
+    {
+      file: ".github/Workflows/CI.YML",
+      line: 5,
+      action: "pnpm/action-setup",
+      ref: "v3",
+    },
+  ]);
+});