diff --git a/appveyor.yml b/appveyor.yml
index 3fde98b..108f250 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -20,7 +20,7 @@ init:
 install:
   - cmd: activate condaenv
   - cmd: conda install -yq numpy scipy pip pytest pandas matplotlib
-  - cmd: pip install pytest-cov coveralls sympy fluids coveralls sympy fuzzywuzzy pint pytz numba IPython
+  - cmd: pip install pytest-cov coveralls sympy fluids coveralls sympy fuzzywuzzy pint pytz numba IPython sphinx
   - cmd: python setup.py install
   - cmd: rmdir /Q /S chemicals
 
diff --git a/conftest.py b/conftest.py
index fdc8ecf..343a6b1 100644
--- a/conftest.py
+++ b/conftest.py
@@ -6,7 +6,7 @@
 
 def pytest_ignore_collect(path):
     path = str(path)
-    if 'benchmark' in path or 'manual_runner' in path or 'make_test_stubs' in path or 'plot' in path or 'prerelease' in path:
+    if 'benchmark' in path or 'manual_runner' in path or 'make_test_stubs' in path or 'plot' in path or 'prerelease' in path or 'conf.py' in path:
         return True
     if 'dev' in path:
         return True