Maybe no quotes. [skip travis]

appveyor.yml

@@ -138,7 +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
-  - if not %GWHEEL_ONLY%==true "%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;}"
@@ -156,13 +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
-  - if not %GWHEEL_ONLY%==true "%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
-  - 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"
+  - 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