diff --git a/src/ScmBackup.Tests.Integration/Hosters/GithubBackupTests.cs b/src/ScmBackup.Tests.Integration/Hosters/GithubBackupTests.cs
index 8253ca0..6e29e16 100644
--- a/src/ScmBackup.Tests.Integration/Hosters/GithubBackupTests.cs
+++ b/src/ScmBackup.Tests.Integration/Hosters/GithubBackupTests.cs
@@ -17,19 +17,9 @@ public class GithubBackupTests : IBackupTests
         internal override string PrivateUserName { get { return TestHelper.EnvVar("Github_Name"); } }
         internal override string PrivateRepoName { get { return TestHelper.EnvVar("Github_RepoPrivate"); } }
 
-        internal override HashSet<string> TestsToSkip
+        protected override bool SkipTestsIssue15()
         {
-            get
-            {
-                var t = new HashSet<string>();
-
-                if (TestHelper.RunsOnAppVeyor())
-                {
-                    // t.Add("DoesntBackupWikiIfNotSet");
-                }
-
-                return t;
-            }
+            return TestHelper.RunsOnAppVeyor();
         }
 
         protected override void Setup(bool usePrivateRepo)
diff --git a/src/ScmBackup.Tests.Integration/Hosters/IBackupTests.cs b/src/ScmBackup.Tests.Integration/Hosters/IBackupTests.cs
index 9ada7f1..36e16c2 100644
--- a/src/ScmBackup.Tests.Integration/Hosters/IBackupTests.cs
+++ b/src/ScmBackup.Tests.Integration/Hosters/IBackupTests.cs
@@ -29,8 +29,12 @@ protected virtual void AssertIssues(string dir) { }
         internal virtual string PrivateRepoName { get { return null; } }
         protected virtual void AssertPrivateRepo(string dir) { }
 
-        // The child classes need to implement this, if they need to skip some tests
-        internal virtual HashSet<string> TestsToSkip { get { return new HashSet<string>(); } }
+        // skip certain tests because of https://github.com/christianspecht/scm-backup/issues/15
+        // Child classes which need to skip those tests need to implement this and return true
+        protected virtual bool SkipTestsIssue15()
+        {
+            return false;
+        }
 
         [Fact]
         public void MakesBackup()
@@ -71,7 +75,7 @@ public void MakesBackupOfPrivateRepo()
         [SkippableFact]
         public void DoesntBackupWikiIfNotSet()
         {
-            Skip.If(this.TestsToSkip.Contains("DoesntBackupWikiIfNotSet"));
+            Skip.If(this.SkipTestsIssue15());
 
             var dir = DirectoryHelper.CreateTempDirectory(this.DirSuffix("doesnt-backup-wiki"));
             this.Setup(false);