diff --git a/internal/js/modules/k6/grpc/client_test.go b/internal/js/modules/k6/grpc/client_test.go
index 9ee51a12f7d..358bfc1cfe0 100644
--- a/internal/js/modules/k6/grpc/client_test.go
+++ b/internal/js/modules/k6/grpc/client_test.go
@@ -1405,13 +1405,13 @@ func TestClientLoadProtoAbsoluteRootWithFile(t *testing.T) {
 	t.Parallel()
 
 	ts := newTestState(t)
-	pwd := "file://" + ts.VU.InitEnvField.CWD.JoinPath("..").JoinPath("..").String()
+	rootPath := ts.VU.InitEnvField.CWD.JoinPath("../..").String()
 
 	tt := testcase{
 		initString: codeBlock{
 			code: `
 			var client = new grpc.Client();
-			client.load(["` + pwd + `"], "../../lib/testutils/httpmultibin/nested_types/nested_types.proto");`,
+			client.load(["` + rootPath + `"], "../../lib/testutils/httpmultibin/nested_types/nested_types.proto");`,
 		},
 	}
 
diff --git a/internal/js/modules/k6/grpc/teststate_test.go b/internal/js/modules/k6/grpc/teststate_test.go
index 830eef515a4..d8137378607 100644
--- a/internal/js/modules/k6/grpc/teststate_test.go
+++ b/internal/js/modules/k6/grpc/teststate_test.go
@@ -4,6 +4,7 @@ import (
 	"io"
 	"net/url"
 	"os"
+	"path/filepath"
 	"runtime"
 	"sync"
 	"testing"
@@ -108,7 +109,7 @@ func newTestState(t *testing.T) testState {
 	if isWindows {
 		fs = fsext.NewTrimFilePathSeparatorFs(fs)
 	}
-	testRuntime.VU.InitEnvField.CWD = &url.URL{Path: cwd}
+	testRuntime.VU.InitEnvField.CWD = &url.URL{Scheme: "file", Path: filepath.ToSlash(cwd)}
 	testRuntime.VU.InitEnvField.FileSystems = map[string]fsext.Fs{"file": fs}
 
 	logger := logrus.New()