diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f961756
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+go-github.test
diff --git a/orgs.go b/orgs.go
index 38b282d..cb27e8f 100644
--- a/orgs.go
+++ b/orgs.go
@@ -39,13 +39,13 @@ type Team struct {
 // List the organizations for a user.  Passing the empty string will list
 // organizations for the authenticated user.
 func (s *OrganizationsService) List(user string) ([]Organization, error) {
-	var url string
+	var url_ string
 	if user != "" {
-		url = fmt.Sprintf("users/%v/orgs", user)
+		url_ = fmt.Sprintf("users/%v/orgs", user)
 	} else {
-		url = "user/orgs"
+		url_ = "user/orgs"
 	}
-	req, err := s.client.NewRequest("GET", url, nil)
+	req, err := s.client.NewRequest("GET", url_, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -57,8 +57,8 @@ func (s *OrganizationsService) List(user string) ([]Organization, error) {
 
 // Get an organization.
 func (s *OrganizationsService) Get(org string) (*Organization, error) {
-	url := fmt.Sprintf("orgs/%v", org)
-	req, err := s.client.NewRequest("GET", url, nil)
+	url_ := fmt.Sprintf("orgs/%v", org)
+	req, err := s.client.NewRequest("GET", url_, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -70,8 +70,8 @@ func (s *OrganizationsService) Get(org string) (*Organization, error) {
 
 // Edit an organization.
 func (s *OrganizationsService) Edit(name string, org *Organization) (*Organization, error) {
-	url := fmt.Sprintf("orgs/%v", name)
-	req, err := s.client.NewRequest("PATCH", url, org)
+	url_ := fmt.Sprintf("orgs/%v", name)
+	req, err := s.client.NewRequest("PATCH", url_, org)
 	if err != nil {
 		return nil, err
 	}
@@ -85,8 +85,8 @@ func (s *OrganizationsService) Edit(name string, org *Organization) (*Organizati
 // of the organization, this will return concealed and public members,
 // otherwise it will only return public members.
 func (s *OrganizationsService) ListMembers(org string) ([]User, error) {
-	url := fmt.Sprintf("orgs/%v/members", org)
-	req, err := s.client.NewRequest("GET", url, nil)
+	url_ := fmt.Sprintf("orgs/%v/members", org)
+	req, err := s.client.NewRequest("GET", url_, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -98,8 +98,8 @@ func (s *OrganizationsService) ListMembers(org string) ([]User, error) {
 
 // List the public members for an organization.
 func (s *OrganizationsService) ListPublicMembers(org string) ([]User, error) {
-	url := fmt.Sprintf("orgs/%v/public_members", org)
-	req, err := s.client.NewRequest("GET", url, nil)
+	url_ := fmt.Sprintf("orgs/%v/public_members", org)
+	req, err := s.client.NewRequest("GET", url_, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -111,8 +111,8 @@ func (s *OrganizationsService) ListPublicMembers(org string) ([]User, error) {
 
 // List the teams for an organization.
 func (s *OrganizationsService) ListTeams(org string) ([]Team, error) {
-	url := fmt.Sprintf("orgs/%v/teams", org)
-	req, err := s.client.NewRequest("GET", url, nil)
+	url_ := fmt.Sprintf("orgs/%v/teams", org)
+	req, err := s.client.NewRequest("GET", url_, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -124,8 +124,8 @@ func (s *OrganizationsService) ListTeams(org string) ([]Team, error) {
 
 // Add a user to a team.
 func (s *OrganizationsService) AddTeamMember(team int, user string) error {
-	url := fmt.Sprintf("teams/%v/members/%v", team, user)
-	req, err := s.client.NewRequest("PUT", url, nil)
+	url_ := fmt.Sprintf("teams/%v/members/%v", team, user)
+	req, err := s.client.NewRequest("PUT", url_, nil)
 	if err != nil {
 		return err
 	}
@@ -136,8 +136,8 @@ func (s *OrganizationsService) AddTeamMember(team int, user string) error {
 
 // Remove a user from a team.
 func (s *OrganizationsService) RemoveTeamMember(team int, user string) error {
-	url := fmt.Sprintf("teams/%v/members/%v", team, user)
-	req, err := s.client.NewRequest("DELETE", url, nil)
+	url_ := fmt.Sprintf("teams/%v/members/%v", team, user)
+	req, err := s.client.NewRequest("DELETE", url_, nil)
 	if err != nil {
 		return err
 	}
@@ -148,8 +148,8 @@ func (s *OrganizationsService) RemoveTeamMember(team int, user string) error {
 
 // Publicize a user's membership in an organization.
 func (s *OrganizationsService) PublicizeMembership(org, user string) error {
-	url := fmt.Sprintf("orgs/%v/public_members/%v", org, user)
-	req, err := s.client.NewRequest("PUT", url, nil)
+	url_ := fmt.Sprintf("orgs/%v/public_members/%v", org, user)
+	req, err := s.client.NewRequest("PUT", url_, nil)
 	if err != nil {
 		return err
 	}
@@ -160,8 +160,8 @@ func (s *OrganizationsService) PublicizeMembership(org, user string) error {
 
 // Conceal a user's membership in an organization.
 func (s *OrganizationsService) ConcealMembership(org, user string) error {
-	url := fmt.Sprintf("orgs/%v/public_members/%v", org, user)
-	req, err := s.client.NewRequest("DELETE", url, nil)
+	url_ := fmt.Sprintf("orgs/%v/public_members/%v", org, user)
+	req, err := s.client.NewRequest("DELETE", url_, nil)
 	if err != nil {
 		return err
 	}
diff --git a/repos.go b/repos.go
index 0ad8fa9..0826b0e 100644
--- a/repos.go
+++ b/repos.go
@@ -49,11 +49,11 @@ type RepositoryListOptions struct {
 // List the repositories for a user.  Passing the empty string will list
 // repositories for the authenticated user.
 func (s *RepositoriesService) List(user string, opt *RepositoryListOptions) ([]Repository, error) {
-	var urls string
+	var url_ string
 	if user != "" {
-		urls = fmt.Sprintf("users/%v/repos", user)
+		url_ = fmt.Sprintf("users/%v/repos", user)
 	} else {
-		urls = "user/repos"
+		url_ = "user/repos"
 	}
 	if opt != nil {
 		params := url.Values{
@@ -62,10 +62,13 @@ func (s *RepositoriesService) List(user string, opt *RepositoryListOptions) ([]R
 			"direction": []string{opt.Direction},
 			"page":      []string{strconv.Itoa(opt.Page)},
 		}
-		urls += "?" + params.Encode()
+		url_ += "?" + params.Encode()
 	}
 
-	req, err := s.client.NewRequest("GET", urls, nil)
+	req, err := s.client.NewRequest("GET", url_, nil)
+	if err != nil {
+		return nil, err
+	}
 
 	repos := new([]Repository)
 	_, err = s.client.Do(req, repos)
@@ -85,16 +88,16 @@ type RepositoryListByOrgOptions struct {
 
 // List the repositories for an organization.
 func (s *RepositoriesService) ListByOrg(org string, opt *RepositoryListByOrgOptions) ([]Repository, error) {
-	urls := fmt.Sprintf("orgs/%v/repos", org)
+	url_ := fmt.Sprintf("orgs/%v/repos", org)
 	if opt != nil {
 		params := url.Values{
 			"type": []string{opt.Type},
 			"page": []string{strconv.Itoa(opt.Page)},
 		}
-		urls += "?" + params.Encode()
+		url_ += "?" + params.Encode()
 	}
 
-	req, err := s.client.NewRequest("GET", urls, nil)
+	req, err := s.client.NewRequest("GET", url_, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -106,8 +109,8 @@ func (s *RepositoriesService) ListByOrg(org string, opt *RepositoryListByOrgOpti
 
 // Get fetches a repository.
 func (s *RepositoriesService) Get(owner, repo string) (*Repository, error) {
-	url := fmt.Sprintf("repos/%v/%v", owner, repo)
-	req, err := s.client.NewRequest("GET", url, nil)
+	url_ := fmt.Sprintf("repos/%v/%v", owner, repo)
+	req, err := s.client.NewRequest("GET", url_, nil)
 	if err != nil {
 		return nil, err
 	}
diff --git a/repos_test.go b/repos_test.go
index 4b6cf09..925677a 100644
--- a/repos_test.go
+++ b/repos_test.go
@@ -39,7 +39,6 @@ func TestRepositoriesService_List_specifiedUser(t *testing.T) {
 	setup()
 	defer teardown()
 
-	opt := &RepositoryListOptions{"owner", "created", "asc", 2}
 	mux.HandleFunc("/users/u/repos", func(w http.ResponseWriter, r *http.Request) {
 		var v string
 		if r.Method != "GET" {
@@ -61,6 +60,7 @@ func TestRepositoriesService_List_specifiedUser(t *testing.T) {
 		fmt.Fprint(w, `[{"id":1}]`)
 	})
 
+	opt := &RepositoryListOptions{"owner", "created", "asc", 2}
 	repos, err := client.Repositories.List("u", opt)
 	if err != nil {
 		t.Errorf("Repositories.List returned error: %v", err)
@@ -76,7 +76,6 @@ func TestRepositoriesService_ListByOrg(t *testing.T) {
 	setup()
 	defer teardown()
 
-	opt := &RepositoryListByOrgOptions{"forks", 2}
 	mux.HandleFunc("/orgs/o/repos", func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != "GET" {
 			t.Errorf("Request method = %v, want %v", r.Method, "GET")
@@ -92,6 +91,7 @@ func TestRepositoriesService_ListByOrg(t *testing.T) {
 		fmt.Fprint(w, `[{"id":1}]`)
 	})
 
+	opt := &RepositoryListByOrgOptions{"forks", 2}
 	repos, err := client.Repositories.ListByOrg("o", opt)
 	if err != nil {
 		t.Errorf("Repositories.ListByOrg returned error: %v", err)