diff --git a/packages/helm/src/__fixtures__/tar/bad-tar.tgz b/packages/helm/src/__fixtures__/tar/bad-tar.tgz
new file mode 100644
index 000000000..b47b58955
Binary files /dev/null and b/packages/helm/src/__fixtures__/tar/bad-tar.tgz differ
diff --git a/packages/helm/src/__tests__/load.ts b/packages/helm/src/__tests__/load.ts
index 6f2728744..72b0a3d09 100644
--- a/packages/helm/src/__tests__/load.ts
+++ b/packages/helm/src/__tests__/load.ts
@@ -18,7 +18,6 @@ jest.mock("@kosko/exec-utils", () => {
 
 const FIXTURE_DIR = join(__dirname, "../__fixtures__");
 const NGINX_CHART = join(FIXTURE_DIR, "nginx");
-const TAR_CHART = join(FIXTURE_DIR, "tar", "prometheus-25.22.0.tgz");
 
 const mockedSpawn = jest.mocked(spawn);
 
@@ -33,11 +32,23 @@ test("chart is a local path", async () => {
   await expect(result()).resolves.toMatchSnapshot();
 });
 
+test("invalid local chart path", async () => {
+  const result = loadChart({ chart: FIXTURE_DIR });
+  await expect(result()).rejects.toThrow();
+});
+
 test("chart is a local tarball", async () => {
-  const result = loadChart({ chart: TAR_CHART });
+  const result = loadChart({
+    chart: join(FIXTURE_DIR, "tar", "prometheus-25.22.0.tgz")
+  });
   await expect(result()).resolves.toMatchSnapshot();
 });
 
+test("invalid local tarball", async () => {
+  const result = loadChart({ chart: join(FIXTURE_DIR, "tar", "bad-tar.tgz") });
+  await expect(result()).rejects.toThrow();
+});
+
 test("chart is remote", async () => {
   const result = loadChart({
     chart: "prometheus",