diff --git a/extensions/browser/src/browser/output-directories.test.ts b/extensions/browser/src/browser/output-directories.test.ts
index 50df0f168a5..3bff524355c 100644
--- a/extensions/browser/src/browser/output-directories.test.ts
+++ b/extensions/browser/src/browser/output-directories.test.ts
@@ -14,7 +14,14 @@ async function withTempDir<T>(run: (tempDir: string) => Promise<T>): Promise<T>
 }
 
 async function expectPathMissing(targetPath: string): Promise<void> {
-  await expect(fs.access(targetPath)).rejects.toMatchObject({ code: "ENOENT" });
+  let error: unknown;
+  try {
+    await fs.access(targetPath);
+  } catch (caught) {
+    error = caught;
+  }
+  expect(error).toBeInstanceOf(Error);
+  expect((error as NodeJS.ErrnoException).code).toBe("ENOENT");
 }
 
 describe("ensureOutputDirectory", () => {
diff --git a/extensions/browser/src/browser/pw-tools-core.waits-next-download-saves-it.test.ts b/extensions/browser/src/browser/pw-tools-core.waits-next-download-saves-it.test.ts
index d11a4fd597b..8078c689108 100644
--- a/extensions/browser/src/browser/pw-tools-core.waits-next-download-saves-it.test.ts
+++ b/extensions/browser/src/browser/pw-tools-core.waits-next-download-saves-it.test.ts
@@ -104,7 +104,14 @@ describe("pw-tools-core", () => {
   }
 
   async function expectPathMissing(targetPath: string): Promise<void> {
-    await expect(fs.access(targetPath)).rejects.toMatchObject({ code: "ENOENT" });
+    let error: unknown;
+    try {
+      await fs.access(targetPath);
+    } catch (caught) {
+      error = caught;
+    }
+    expect(error).toBeInstanceOf(Error);
+    expect((error as NodeJS.ErrnoException).code).toBe("ENOENT");
   }
 
   function createDownloadEventHarness() {
diff --git a/extensions/memory-wiki/src/compile.test.ts b/extensions/memory-wiki/src/compile.test.ts
index a2326e06ce5..c85d5be4861 100644
--- a/extensions/memory-wiki/src/compile.test.ts
+++ b/extensions/memory-wiki/src/compile.test.ts
@@ -27,7 +27,14 @@ describe("compileMemoryWikiVault", () => {
   }
 
   async function expectPathMissing(targetPath: string): Promise<void> {
-    await expect(fs.access(targetPath)).rejects.toMatchObject({ code: "ENOENT" });
+    let error: unknown;
+    try {
+      await fs.access(targetPath);
+    } catch (caught) {
+      error = caught;
+    }
+    expect(error).toBeInstanceOf(Error);
+    expect((error as NodeJS.ErrnoException).code).toBe("ENOENT");
   }
 
   function expectDigestPage<T extends { path: string }>(pages: T[], pagePath: string): T {