diff --git a/fabfile.py b/fabfile.py
index 22dadac11..97afd2847 100644
--- a/fabfile.py
+++ b/fabfile.py
@@ -55,9 +55,9 @@ def prebuild(build_dir='/tmp/build_spacy'):
             local('fab clean make')
             local('cp -r %s/corpora/en/wordnet corpora/en/' % spacy_dir)
             local('PYTHONPATH=`pwd` python bin/init_model.py en lang_data corpora spacy/en/data')
-            local('fab test')
+            local('PYTHONPATH=`pwd` fab test')
             local('PYTHONPATH=`pwd` python -m spacy.en.download --force all')
-            local('py.test --models spacy/tests/')
+            local('PYTHONPATH=`pwd` py.test --models spacy/tests/')
 
 
 def docs():