diff --git a/Code/Mantid/docs/CMakeLists.txt b/Code/Mantid/docs/CMakeLists.txt
index 90b2acf406cc4ca8082177f044988fbad8db2cee..427bcbe751689c8e448146493415ad394185ca71 100644
--- a/Code/Mantid/docs/CMakeLists.txt
+++ b/Code/Mantid/docs/CMakeLists.txt
@@ -80,7 +80,7 @@ if ( SPHINX_FOUND )
   set ( BUILDER doctest )
   configure_file ( runsphinx.py.in runsphinx_doctest.py @ONLY )
   add_custom_target ( ${TARGET_PREFIX}-test
-    COMMAND ${DOCS_RUNNER_EXE} -xq runsphinx_doctest.py
+    COMMAND ${PYTHON_EXECUTABLE} runsphinx_doctest.py
     DEPENDS Framework MantidPlot
     COMMENT "Running documentation tests"
   )