diff --git a/LibGit2Sharp.Tests/TestHelpers/BaseFixture.cs b/LibGit2Sharp.Tests/TestHelpers/BaseFixture.cs
index c188efb9c..daa7451ae 100644
--- a/LibGit2Sharp.Tests/TestHelpers/BaseFixture.cs
+++ b/LibGit2Sharp.Tests/TestHelpers/BaseFixture.cs
@@ -59,25 +59,32 @@ private static void SetUpTestEnvironment()
         {
             IsFileSystemCaseSensitive = IsFileSystemCaseSensitiveInternal();
 
-            string initialAssemblyParentFolder = Directory.GetParent(new Uri(typeof(BaseFixture).GetTypeInfo().Assembly.CodeBase).LocalPath).FullName;
+            var resourcesPath = Environment.GetEnvironmentVariable("LIBGIT2SHARP_RESOURCES");
 
-            const string sourceRelativePath = @"../../../../LibGit2Sharp.Tests/Resources";
-            ResourcesDirectory = new DirectoryInfo(Path.Combine(initialAssemblyParentFolder, sourceRelativePath));
+            if (resourcesPath == null)
+            {
+                string initialAssemblyParentFolder = Directory.GetParent(new Uri(typeof(BaseFixture).GetTypeInfo().Assembly.CodeBase).LocalPath).FullName;
+                const string sourceRelativePath = @"../../../../LibGit2Sharp.Tests/Resources";
+
+                resourcesPath = Path.Combine(initialAssemblyParentFolder, sourceRelativePath);
+            }
+
+            ResourcesDirectory = new DirectoryInfo(resourcesPath);
 
             // Setup standard paths to our test repositories
-            BareTestRepoPath = Path.Combine(sourceRelativePath, "testrepo.git");
-            StandardTestRepoWorkingDirPath = Path.Combine(sourceRelativePath, "testrepo_wd");
+            BareTestRepoPath = Path.Combine(ResourcesDirectory.FullName, "testrepo.git");
+            StandardTestRepoWorkingDirPath = Path.Combine(ResourcesDirectory.FullName, "testrepo_wd");
             StandardTestRepoPath = Path.Combine(StandardTestRepoWorkingDirPath, "dot_git");
-            ShallowTestRepoPath = Path.Combine(sourceRelativePath, "shallow.git");
-            MergedTestRepoWorkingDirPath = Path.Combine(sourceRelativePath, "mergedrepo_wd");
-            MergeRenamesTestRepoWorkingDirPath = Path.Combine(sourceRelativePath, "mergerenames_wd");
-            MergeTestRepoWorkingDirPath = Path.Combine(sourceRelativePath, "merge_testrepo_wd");
-            RevertTestRepoWorkingDirPath = Path.Combine(sourceRelativePath, "revert_testrepo_wd");
-            SubmoduleTestRepoWorkingDirPath = Path.Combine(sourceRelativePath, "submodule_wd");
-            SubmoduleTargetTestRepoWorkingDirPath = Path.Combine(sourceRelativePath, "submodule_target_wd");
-            AssumeUnchangedRepoWorkingDirPath = Path.Combine(sourceRelativePath, "assume_unchanged_wd");
-            SubmoduleSmallTestRepoWorkingDirPath = Path.Combine(sourceRelativePath, "submodule_small_wd");
-            PackBuilderTestRepoPath = Path.Combine(sourceRelativePath, "packbuilder_testrepo_wd");
+            ShallowTestRepoPath = Path.Combine(ResourcesDirectory.FullName, "shallow.git");
+            MergedTestRepoWorkingDirPath = Path.Combine(ResourcesDirectory.FullName, "mergedrepo_wd");
+            MergeRenamesTestRepoWorkingDirPath = Path.Combine(ResourcesDirectory.FullName, "mergerenames_wd");
+            MergeTestRepoWorkingDirPath = Path.Combine(ResourcesDirectory.FullName, "merge_testrepo_wd");
+            RevertTestRepoWorkingDirPath = Path.Combine(ResourcesDirectory.FullName, "revert_testrepo_wd");
+            SubmoduleTestRepoWorkingDirPath = Path.Combine(ResourcesDirectory.FullName, "submodule_wd");
+            SubmoduleTargetTestRepoWorkingDirPath = Path.Combine(ResourcesDirectory.FullName, "submodule_target_wd");
+            AssumeUnchangedRepoWorkingDirPath = Path.Combine(ResourcesDirectory.FullName, "assume_unchanged_wd");
+            SubmoduleSmallTestRepoWorkingDirPath = Path.Combine(ResourcesDirectory.FullName, "submodule_small_wd");
+            PackBuilderTestRepoPath = Path.Combine(ResourcesDirectory.FullName, "packbuilder_testrepo_wd");
 
             CleanupTestReposOlderThan(TimeSpan.FromMinutes(15));
         }