Remove usage of http.DefaultClient

api/api.go

@@ -86,7 +86,7 @@ type Config struct {
 func DefaultConfig() *Config {
 	config := &Config{
 		Address:    "http://127.0.0.1:4646",
-		HttpClient: http.DefaultClient,
+		HttpClient: &http.Client{},
 	}
 	if addr := os.Getenv("NOMAD_ADDR"); addr != "" {
 		config.Address = addr

testutil/server.go

@@ -156,8 +156,7 @@ func NewTestServer(t *testing.T, cb ServerConfigCallback) *TestServer {
 		t.Fatalf("err: %s", err)
 	}
 
-	var client *http.Client
-	client = http.DefaultClient
+	client := &http.Client{}
 
 	server := &TestServer{
 		Config: nomadConfig,