diff --git a/src/cli/tests/cli.integration.spec.ts b/src/cli/tests/cli.integration.spec.ts
index 0a490a4..f082246 100644
--- a/src/cli/tests/cli.integration.spec.ts
+++ b/src/cli/tests/cli.integration.spec.ts
@@ -108,16 +108,21 @@ async function hashAllTheThings(
   const hashes = await Promise.all(hashAll);
   return hashes.reduce<{ readonly [filename: string]: string }>(
     (acc, hash, i) => {
-      const trimmedFilePath = relative(buildDir, filePaths[i]);
+      const trimmedNormalizedFilePath = normalizePath(relative(buildDir, filePaths[i]));
       return {
         ...acc,
-        [trimmedFilePath]: hash
+        [trimmedNormalizedFilePath]: hash
       };
     },
     {}
   );
 }
 
+// On Windows, convert backslashes to forward slashes
+function normalizePath(p: string) {
+  return process.platform === 'win32' ? p.replace(/\\/g, '/') : p;
+}
+
 test(`${
   TestDirectories.one
 }: parses CLI arguments, handles default options`, async t => {