diff --git a/pkg/iac/terraform/state/backend/gs_reader_test.go b/pkg/iac/terraform/state/backend/gs_reader_test.go
index 49780fe2..ff5ccf44 100644
--- a/pkg/iac/terraform/state/backend/gs_reader_test.go
+++ b/pkg/iac/terraform/state/backend/gs_reader_test.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"os"
 	"reflect"
 	"testing"
 
@@ -34,6 +35,8 @@ func TestGSBackendInvalid(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			_ = os.Setenv("GOOGLE_APPLICATION_CREDENTIALS", "testdata/gcp_application_default_credentials.json")
+
 			got, err := NewGSReader(tt.args.path)
 			if err.Error() != tt.wantErr.Error() {
 				t.Errorf("NewGSReader() error = '%s', wantErr '%s'", err, tt.wantErr)
diff --git a/pkg/iac/terraform/state/backend/testdata/gcp_application_default_credentials.json b/pkg/iac/terraform/state/backend/testdata/gcp_application_default_credentials.json
new file mode 100644
index 00000000..a66562e0
--- /dev/null
+++ b/pkg/iac/terraform/state/backend/testdata/gcp_application_default_credentials.json
@@ -0,0 +1,7 @@
+{
+  "client_id": "testdata.driftctl.apps.googleusercontent.com",
+  "client_secret": "fake-secret",
+  "quota_project_id": "fake-project-id",
+  "refresh_token": "fake-token",
+  "type": "authorized_user"
+}
\ No newline at end of file