diff --git a/params_test.go b/params_test.go
new file mode 100644
index 0000000..112850d
--- /dev/null
+++ b/params_test.go
@@ -0,0 +1,42 @@
+package gophercloud
+
+import (
+	"net/url"
+	"testing"
+
+	th "github.com/rackspace/gophercloud/testhelper"
+)
+
+func TestMaybeStringWithNonEmptyString(t *testing.T) {
+	testString := "carol"
+	expected := &testString
+	actual := MaybeString("carol")
+	th.CheckDeepEquals(t, actual, expected)
+}
+
+func TestMaybeStringWithEmptyString(t *testing.T) {
+	var expected *string
+	actual := MaybeString("")
+	th.CheckDeepEquals(t, actual, expected)
+}
+
+func TestBuildQueryStringWithPointerToStruct(t *testing.T) {
+	expected := &url.URL{
+		RawQuery: "j=2&r=red",
+	}
+
+	type Opts struct {
+		J int    `q:"j"`
+		R string `q:"r"`
+		C bool
+	}
+
+	opts := Opts{J: 2, R: "red"}
+
+	actual, err := BuildQueryString(opts)
+	if err != nil {
+		t.Errorf("Error building query string: %v", err)
+	}
+
+	th.CheckDeepEquals(t, actual, expected)
+}