diff --git a/verifiers/internal/gha/npm_sigstore_tuf_test.go b/verifiers/internal/gha/npm_sigstore_tuf_test.go
index 84a3e81a4..6f0e94cae 100644
--- a/verifiers/internal/gha/npm_sigstore_tuf_test.go
+++ b/verifiers/internal/gha/npm_sigstore_tuf_test.go
@@ -15,10 +15,13 @@ const (
 	testTargetKeyMaterial   = "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE1Olb3zMAFFxXKHiIkQO5cJ3Yhl5i6UPp+IhuteBJbuHcA5UogKo0EWtlWwW6KSaKoTNEYL7JlCQiVnkhBktUgg=="
 )
 
+// mockSigstoreTufClient a mock implementation of SigstoreTufClient
 type mockSigstoreTufClient struct {
+	SigstoreTufClient
 	localPath string
 }
 
+// GetTarget mock implementation of GetTarget for the mockSigstoreTufClient
 func (client mockSigstoreTufClient) GetTarget(targetPath string) ([]byte, error) {
 	content, err := os.ReadFile(targetPath)
 	if err != nil {
@@ -27,18 +30,13 @@ func (client mockSigstoreTufClient) GetTarget(targetPath string) ([]byte, error)
 	return content, nil
 }
 
-func mustReadLocalFile(t *testing.T, filePath string) []byte {
-	content, err := os.ReadFile(filePath)
-	assert.NoErrorf(t, err, "reading local file: %s", err)
-	return content
-}
-
 // TestGetTarget ensures we can parse the target file
 func TestGetNpmjsKeysTarget(t *testing.T) {
 	t.Run("parsing local registry.npmjs.org_keys.json", func(t *testing.T) {
-		content := mustReadLocalFile(t, testTargetLocalFilePath)
+		content, err := os.ReadFile(testTargetLocalFilePath)
+		assert.NoErrorf(t, err, "reading local file: %s", err)
 		var expectedKeys NpmjsKeysTarget
-		err := json.Unmarshal(content, &expectedKeys)
+		err = json.Unmarshal(content, &expectedKeys)
 		assert.NoErrorf(t, err, "parsing mock file: %s", err)
 
 		mockClient := mockSigstoreTufClient{localPath: testTargetLocalFilePath}
@@ -48,13 +46,14 @@ func TestGetNpmjsKeysTarget(t *testing.T) {
 	})
 
 	t.Run("parsing non-existant registry.npmjs.org_keys.json", func(t *testing.T) {
-		nonExistantPath := "./testdatamy-fake-path"
+		nonExistantPath := "./testdata/my-fake-path"
 		mockClient := mockSigstoreTufClient{localPath: nonExistantPath}
 		_, err := GetNpmjsKeysTarget(mockClient, nonExistantPath)
 		assert.Error(t, err)
 	})
 }
 
+// TestGetAttestationKeyMaterialByKeyId ensure that we find the "npm:attestations" key material, given keyid
 func TestGetAttestationKeyMaterialByKeyId(t *testing.T) {
 	tests := []struct {
 		name                string
@@ -72,7 +71,7 @@ func TestGetAttestationKeyMaterialByKeyId(t *testing.T) {
 			expectError:         false,
 		},
 		{
-			name:                "missing attestation keyusage",
+			name:                "missing the 'npm:attestations' keyusage",
 			localPath:           "./testdata/wrong_keyusage_registry.npmjs.org_keys.json",
 			keyId:               testTargetKeyId,
 			expectedKeyMaterial: testTargetKeyMaterial,