One more flaky test on 3.5 [skip travis]

appveyor.yml

@@ -45,21 +45,31 @@ environment:
       PYTHON_VERSION: "3.5.x" # currently 3.5.2
       PYTHON_ARCH: "32"
       PYTHON_EXE: python
+      GWHEEL_ONLY: true
 
     - PYTHON: "C:\\Python27"
       PYTHON_VERSION: "2.7.x" # currently 2.7.13
       PYTHON_ARCH: "32"
       PYTHON_EXE: python
+      GWHEEL_ONLY: true
 
     - PYTHON: "C:\\Python34"
       PYTHON_VERSION: "3.4.x" # currently 3.4.3
       PYTHON_ARCH: "32"
       PYTHON_EXE: python
+      GWHEEL_ONLY: true
 
     - PYTHON: "C:\\Python36"
       PYTHON_VERSION: "3.6.x" # currently 3.6.3
       PYTHON_ARCH: "32"
       PYTHON_EXE: python
+      GWHEEL_ONLY: true
+
+    - PYTHON: "C:\\Python37"
+      PYTHON_VERSION: "3.7.x"
+      PYTHON_ARCH: "32"
+      PYTHON_EXE: python
+      GWHEEL_ONLY: true
 
 
     # Also test a Python version not pre-installed
@@ -128,7 +138,7 @@ install:
   # compiled extensions and are not provided as pre-built wheel packages,
   # pip will build them from source using the MSVC compiler matching the
   # target Python version and architecture
-  - "%CMD_IN_ENV% %PYEXE% -m pip install -U --upgrade-strategy=eager -r ci-requirements.txt"
+  - if not %GWHEEL_ONLY%==true "%CMD_IN_ENV% %PYEXE% -m pip install -U --upgrade-strategy=eager -r ci-requirements.txt"
 
   - ps: "if(Test-Path(\"${env:PYTHON}\\bin\")) {ls ${env:PYTHON}\\bin;}"
   - ps: "if(Test-Path(\"${env:PYTHON}\\Scripts\")) {ls ${env:PYTHON}\\Scripts;}"
@@ -146,13 +156,13 @@ build_script:
   # into a variable, using python to glob.
   - "%PYEXE% -c \"import glob; print(glob.glob('dist/gevent*whl')[0])\" > whl.txt"
   - set /p PYWHL=<whl.txt
-  - "%PYEXE% -m pip install -U --upgrade-strategy=eager %PYWHL%[test,events,dnspython]"
+  - if not %GWHEEL_ONLY%==true "%PYEXE% -m pip install -U --upgrade-strategy=eager %PYWHL%[test,events,dnspython]"
 
 test_script:
   # Run the project tests
-  - "%PYEXE% -c \"import gevent.core; print(gevent.core.loop)\""
-  - "%PYEXE% -c \"import gevent; print(gevent.config.settings['resolver'].get_options())\""
-  - "%PYEXE% -mgevent.tests --config known_failures.py --quiet"
+  - if not %GWHEEL_ONLY%==true "%PYEXE% -c \"import gevent.core; print(gevent.core.loop)\""
+  - if not %GWHEEL_ONLY%==true "%PYEXE% -c \"import gevent; print(gevent.config.settings['resolver'].get_options())\""
+  - if not %GWHEEL_ONLY%==true "%PYEXE% -mgevent.tests --config known_failures.py --quiet"
 
 after_test:
   # We already built the wheel during build_script, because it's

src/gevent/testing/patched_tests_setup.py

@@ -593,6 +593,7 @@ if WIN:
         'test_socket.SendfileUsingSendTest.testWithTimeout': _flaky_socket_timeout,
         'test_socket.SendfileUsingSendTest.testOffset': _flaky_socket_timeout,
         'test_socket.SendfileUsingSendTest.testRegularFile': _flaky_socket_timeout,
+        'test_socket.SendfileUsingSendTest.testCount': _flaky_socket_timeout,
     })
 
 if PYPY: