diff --git a/packages/angular/build/src/builders/unit-test/options.ts b/packages/angular/build/src/builders/unit-test/options.ts
index 74b30b1e95a6..3b003e9c3620 100644
--- a/packages/angular/build/src/builders/unit-test/options.ts
+++ b/packages/angular/build/src/builders/unit-test/options.ts
@@ -127,7 +127,7 @@ export async function normalizeOptions(
     dumpVirtualFiles: options.dumpVirtualFiles,
     listTests: options.listTests,
     runnerConfig:
-      typeof runnerConfig === 'string' ? path.join(workspaceRoot, runnerConfig) : runnerConfig,
+      typeof runnerConfig === 'string' ? path.resolve(workspaceRoot, runnerConfig) : runnerConfig,
   };
 }