fix: initialize `assert` for `withBuffer` test

internal/storage/options_test.go

@@ -60,6 +60,8 @@ func Test_getOpts(t *testing.T) {
 		assert.Equal(opts, testOpts)
 	})
 	t.Run("WithBuffer", func(t *testing.T) {
+		t.Parallel()
+		assert := assert.New(t)
 		testOpts := getDefaultOptions()
 		opts := GetOpts(WithBuffer(0))
 		assert.Equal(testOpts, opts)