diff --git a/packages/dev-server/src/pipeline.ts b/packages/dev-server/src/pipeline.ts
index 030d574b..0457fa67 100644
--- a/packages/dev-server/src/pipeline.ts
+++ b/packages/dev-server/src/pipeline.ts
@@ -259,6 +259,7 @@ async function rewriteArtifactImportsAsync(
 }
 
 export async function loadModule(file: string): Promise<Record<string, unknown>> {
+  file = resolve(file);
   let mod = moduleCache.get(file);
   if (!mod) {
     mod = (async () => {
@@ -631,6 +632,7 @@ export function serveWrnBrowserArtifact(pathname: string): Response | null {
 
 /** Forget one module and force its next dynamic import to bypass Bun's import cache. */
 export function invalidateModule(file: string): void {
+  file = resolve(file);
   moduleCache.delete(file);
   moduleVersions.set(file, (moduleVersions.get(file) ?? 0) + 1);
 }
diff --git a/packages/dev-server/test/pipeline.test.ts b/packages/dev-server/test/pipeline.test.ts
index 0be320a7..dd3d9648 100644
--- a/packages/dev-server/test/pipeline.test.ts
+++ b/packages/dev-server/test/pipeline.test.ts
@@ -83,7 +83,7 @@ test("invalidateModule loads changed server modules without restarting the proce
   }
 });
 
-test("invalidateModule recompiles changed WRN files in-process", async () => {
+test("invalidateModule recompiles changed WRN files with watcher-normalized separators", async () => {
   const root = mkdtempSync(join(tmpdir(), "wrnexus-hmr-"));
   const file = join(root, "page.wrn");
   setCompileCacheDir(join(root, ".wrnexus"));
@@ -94,7 +94,7 @@ test("invalidateModule recompiles changed WRN files in-process", async () => {
     expect(String(first({}))).toContain("First");
 
     writeFileSync(file, "page Home { view { <h1>Second</h1> } }\n");
-    invalidateModule(file);
+    invalidateModule(file.replace(/\\/g, "/"));
     const second = (await loadModule(file)).default as (ctx: unknown) => unknown;
     expect(String(second({}))).toContain("Second");
   } finally {