diff --git a/packages/compiler-cli/src/ngtsc/program.ts b/packages/compiler-cli/src/ngtsc/program.ts
index 08870ad4cd..620be30788 100644
--- a/packages/compiler-cli/src/ngtsc/program.ts
+++ b/packages/compiler-cli/src/ngtsc/program.ts
@@ -202,7 +202,7 @@ export class NgtscProgram implements api.Program {
       // Relative entry paths are disallowed.
       if (entryRoute.startsWith('.')) {
         throw new Error(
-            `Falied to list lazy routes: Resolution of relative paths (${entryRoute}) is not supported.`);
+            `Failed to list lazy routes: Resolution of relative paths (${entryRoute}) is not supported.`);
       }
 
       // Non-relative entry paths fall into one of the following categories:
diff --git a/packages/compiler-cli/test/ngtsc/ngtsc_spec.ts b/packages/compiler-cli/test/ngtsc/ngtsc_spec.ts
index 6480d69d45..71c02f37d6 100644
--- a/packages/compiler-cli/test/ngtsc/ngtsc_spec.ts
+++ b/packages/compiler-cli/test/ngtsc/ngtsc_spec.ts
@@ -2520,9 +2520,9 @@ describe('ngtsc behavioral tests', () => {
           export class TestModule {}
         `);
 
-        const entryModule1 = path.join(env.basePath, 'test#TestModule');
-        const entryModule2 = path.join(env.basePath, 'not-test#TestModule');
-        const entryModule3 = path.join(env.basePath, 'test#NotTestModule');
+        const entryModule1 = path.posix.join(env.basePath, 'test#TestModule');
+        const entryModule2 = path.posix.join(env.basePath, 'not-test#TestModule');
+        const entryModule3 = path.posix.join(env.basePath, 'test#NotTestModule');
 
         expect(() => env.driveRoutes(entryModule1)).not.toThrow();
         expect(() => env.driveRoutes(entryModule2))