Rerun flaky PyPy failures

.appveyor.yml

@@ -17,14 +17,14 @@ environment:
     EXECUTABLE: bin/pypy.exe
     PIP_DIR: bin
     VENV: YES
+    TEST_OPTIONS: '--force-flaky --no-success-flaky-report'
   - PYTHON: C:/Python27-x64
   - PYTHON: C:/Python34
   - PYTHON: C:/Python27
   - PYTHON: C:/Python34-x64
   - PYTHON: C:/msys64/mingw32
     EXECUTABLE: bin/python3
     PIP_DIR: bin
-    TEST_OPTIONS: --processes=0
     DEPLOY: NO
 
 
@@ -72,8 +72,12 @@ build_script:
 test_script:
 - cd c:\pillow
 - '%PYTHON%\%PIP_DIR%\pip.exe install pytest pytest-cov'
-- '%PYTHON%\%EXECUTABLE% -m pytest -vx --cov PIL --cov-report term --cov-report xml Tests'
-#- '%PYTHON%\%EXECUTABLE% test-installed.py -v -s %TEST_OPTIONS%' TODO TEST_OPTIONS with pytest?
+- ps: |
+      if ($env:PYTHON -eq "c:/vp/pypy2")
+      {
+        '%PYTHON%\%PIP_DIR%\pip.exe install flaky'
+      }
+- '%PYTHON%\%EXECUTABLE% -m pytest -vx --cov PIL --cov-report term --cov-report xml %TEST_OPTIONS% Tests'
 
 after_test:
 - pip install codecov