diff --git a/browser/helpers_test.go b/browser/helpers_test.go
new file mode 100644
index 000000000..da758924a
--- /dev/null
+++ b/browser/helpers_test.go
@@ -0,0 +1,25 @@
+package browser
+
+import (
+	"testing"
+
+	"github.com/grafana/sobek"
+	"github.com/stretchr/testify/require"
+)
+
+func TestSobekEmptyString(t *testing.T) {
+	// SobekEmpty string should return true if the argument
+	// is an empty string or not defined in the Sobek runtime.
+	rt := sobek.New()
+	require.NoError(t, rt.Set("sobekEmptyString", sobekEmptyString))
+	for _, s := range []string{"() => true", "'() => false'"} { // not empty
+		v, err := rt.RunString(`sobekEmptyString(` + s + `)`)
+		require.NoError(t, err)
+		require.Falsef(t, v.ToBoolean(), "got: true, want: false for %q", s)
+	}
+	for _, s := range []string{"", "  ", "null", "undefined"} { // empty
+		v, err := rt.RunString(`sobekEmptyString(` + s + `)`)
+		require.NoError(t, err)
+		require.Truef(t, v.ToBoolean(), "got: false, want: true for %q", s)
+	}
+}