diff --git a/Duplicati/Library/Backend/GoogleServices/WebApi.cs b/Duplicati/Library/Backend/GoogleServices/WebApi.cs
index 815f599cb..914f7cc37 100644
--- a/Duplicati/Library/Backend/GoogleServices/WebApi.cs
+++ b/Duplicati/Library/Backend/GoogleServices/WebApi.cs
@@ -22,7 +22,7 @@ namespace Duplicati.Library.Backend.WebApi
 {
     public class Google
     {
-        public class QueryParam
+        protected class QueryParam
         {
             public const string File = "q";
             public const string PageToken = "pageToken";
@@ -30,7 +30,7 @@ namespace Duplicati.Library.Backend.WebApi
             public const string Alt = "alt";
         }
 
-        public class QueryValue
+        protected class QueryValue
         {
             public const string True = "true";
             public const string Resumable = "resumable";
diff --git a/Duplicati/Library/Utility/UrlPath.cs b/Duplicati/Library/Utility/UrlPath.cs
index 717ed2e1b..449cfece5 100644
--- a/Duplicati/Library/Utility/UrlPath.cs
+++ b/Duplicati/Library/Utility/UrlPath.cs
@@ -21,13 +21,7 @@ namespace Duplicati.Library.Utility
 {
     public class UrlPath
     {
-        /// <summary>
-        /// Concats paths of URIs.
-        /// </summary>
-        /// <returns>The concatenated paths.</returns>
-        /// <param name="path">Path1.</param>
-
-        StringBuilder paths;
+        readonly StringBuilder paths;
         bool trailingSlash = false;
 
         public UrlPath(string path)
diff --git a/Duplicati/UnitTest/WebApiTests.cs b/Duplicati/UnitTest/WebApiTests.cs
index c1b0017e9..0c8784827 100644
--- a/Duplicati/UnitTest/WebApiTests.cs
+++ b/Duplicati/UnitTest/WebApiTests.cs
@@ -24,7 +24,7 @@ namespace Duplicati.UnitTest
     {
         [Test]
         [Category("WebApi")]
-        public void GoogleCloudPutUrl()
+        public static void GoogleCloudPutUrl()
         {
             string bucketId = "my_bucket";
 
@@ -35,7 +35,7 @@ namespace Duplicati.UnitTest
 
         [Test]
         [Category("WebApi")]
-        public void CreateFolderUrl()
+        public static void CreateFolderUrl()
         {
             var url = "https://www.googleapis.com/drive/v2/files?supportsTeamDrives=true";
             Assert.AreEqual(url, GoogleDrive.CreateFolderUrl(true));
@@ -43,7 +43,7 @@ namespace Duplicati.UnitTest
 
         [Test]
         [Category("WebApi")]
-        public void AboutInfoUrl()
+        public static void AboutInfoUrl()
         {
             var url = "https://www.googleapis.com/drive/v2/about";
             Assert.AreEqual(url, GoogleDrive.AboutInfoUrl());