diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a4a968b..fde92e6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,10 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
     timeout-minutes: 10
     
     steps:
diff --git a/tests/ProcessManager.test.ts b/tests/ProcessManager.test.ts
index 31fe0ec..583bcf0 100644
--- a/tests/ProcessManager.test.ts
+++ b/tests/ProcessManager.test.ts
@@ -309,7 +309,7 @@ describe("ProcessManager", () => {
 
       expect(success).toBe(false);
       expect(currentManager.getState()).toBe("error");
-      expect(currentManager.getLastError()).toContain("not found");
+      expect(currentManager.getLastError()).toContain("Process exited unexpectedly (exit code 127)");
     });
 
     test("handles double stop gracefully", async () => {