diff --git a/appveyor.yml b/appveyor.yml
index 9c28186..9532664 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -5,9 +5,9 @@
 # OS: 64-bit Windows Server 2012 R2
 # Compilers: 64-bit MinGw-w64 5.1.0 (downloaded during script execution)
 # Python: 2.7, both 32-bit and 64-bit versions
+# Python: 3.4, both 32-bit and 64-bit versions
 #
 # Notes:
-# Can be extended for use with Python 3
 # Where "ps:" is used commands are executed in PowerShell
 ##
 
@@ -21,12 +21,17 @@ environment:
 # set MinGw-w64 (64-bit) version 5.1.0 download URL
   url: http://kent.dl.sourceforge.net/project/mingw-w64/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/5.1.0/threads-posix/seh/x86_64-5.1.0-release-posix-seh-rt_v4-rev0.7z
 # user can possibly use different Python versions, we try to test multiple cases
-# 64-bit version is recommended
+# 64-bit version on 64-bit system allows easier installation of Python packages using .exe installers
+# and better CMake automatic detection of some Python tools
   matrix:
 # Python 2.7; 32-bit version
     - python: C:\Python27;C:\Python27\Scripts
 # Python 2.7; 64-bit version
     - python: C:\Python27-x64;C:\Python27-x64\Scripts
+# Python 3.4; 32-bit version
+    - python: C:\Python34;C:\Python34\Scripts
+# Python 3.4; 64-bit version
+    - python: C:\Python34-x64;C:\Python34-x64\Scripts
 
 build_script:
 # add location of used Python to path
@@ -50,7 +55,7 @@ build_script:
 - pip install pytest
 
 # go back to project source dir
-- cd C:\projects\autocmake
+- cd %APPVEYOR_BUILD_FOLDER%
 
 test_script:
 # show environment
diff --git a/test/test.py b/test/test.py
index 0258c3a..eb91051 100644
--- a/test/test.py
+++ b/test/test.py
@@ -46,9 +46,21 @@ def fetch_url(src, dst):
 
 
 def exe(command):
+    """
+    Executes command and returns string representations of stdout and stderr captured from the console.
+    When universal_newlines=True stdout and stderr are opened in text mode.
+    Otherwise, they are opened in binary mode. In that case captured stdout and stderr
+    are not strings and Python 3 throws type error when compared against strings later in tests.
+    Note:
+    This feature is only available if Python is built with universal newline support (the default).
+    Also, the newlines attribute of the file objects stdout, stdin and stderr are not updated by the
+    communicate() method.
+    See https://docs.python.org/2/library/subprocess.html
+    """
     stdout, stderr = subprocess.Popen(shlex.split(command),
                                       stdout=subprocess.PIPE,
-                                      stderr=subprocess.PIPE).communicate()
+                                      stderr=subprocess.PIPE,
+                                      universal_newlines=True).communicate()
     return stdout, stderr
 
 # ------------------------------------------------------------------------------