3 files changed, 9 insertions, 2 deletions
diff --git a/git/test/performance/lib.py b/git/test/performance/lib.py
index bb3f7a99..eebbfd76 100644
--- a/git/test/performance/lib.py
+++ b/git/test/performance/lib.py
@@ -4,7 +4,6 @@ from git.test.lib import (
     TestBase
 )
 from gitdb.test.lib import skip_on_travis_ci
-import shutil
 import tempfile
 import logging
 
@@ -16,6 +15,7 @@ from git.db import (
 from git import (
     Repo
 )
+from git.util import rmtree
 
 #{ Invvariants
 k_env_git_repo = "GIT_PYTHON_TEST_GIT_REPO_BASE"
@@ -86,7 +86,7 @@ class TestBigRepoRW(TestBigRepoR):
     def tearDown(self):
         super(TestBigRepoRW, self).tearDown()
         if self.gitrwrepo is not None:
-            shutil.rmtree(self.gitrwrepo.working_dir)
+            rmtree(self.gitrwrepo.working_dir)
             self.gitrwrepo.git.clear_cache()
         self.gitrwrepo = None
         self.puregitrwrepo.git.clear_cache()
diff --git a/git/test/performance/test_commit.py b/git/test/performance/test_commit.py
index b59c747e..c60dc2fc 100644
--- a/git/test/performance/test_commit.py
+++ b/git/test/performance/test_commit.py
@@ -17,6 +17,10 @@ from git.test.test_commit import assert_commit_serialization
 
 class TestPerformance(TestBigRepoRW):
 
+    def tearDown(self):
+        import gc
+        gc.collect()
+
     # ref with about 100 commits in its history
     ref_100 = '0.1.6'
 
diff --git a/git/test/performance/test_streams.py b/git/test/performance/test_streams.py
index 4b1738cd..8194547c 100644
--- a/git/test/performance/test_streams.py
+++ b/git/test/performance/test_streams.py
@@ -87,6 +87,9 @@ class TestObjDBPerformance(TestBigRepoR):
                   % (size_kib, desc, cs_kib, elapsed_readchunks, size_kib / elapsed_readchunks), file=sys.stderr)
 
             # del db file so git has something to do
+            ostream = None
+            import gc
+            gc.collect()
             os.remove(db_file)
 
             # VS. CGIT