diff --git a/tox.ini b/tox.ini
index 2b55a08ea..333a45291 100644
--- a/tox.ini
+++ b/tox.ini
@@ -95,7 +95,9 @@ whitelist_externals =
     isort
 commands =
     isort --version
-    python -c "import subprocess, sys; output = subprocess.check_output('isort -q --diff --recursive deluge docs packaging *.py', shell=True); print output; sys.exit(len(output) != 0)"
+    python -c "import subprocess, sys; output = subprocess.check_output(\
+        'isort -q --diff --recursive deluge docs packaging *.py', shell=True);\
+        print output; sys.exit(bool(output))"
 
 [testenv:flake8]
 # Disble site packages to avoid using system flake8 which uses hardcoded python path which imports the wrong libraries.
@@ -180,16 +182,17 @@ deps =
     pillow
 whitelist_externals =
     {[testenv]whitelist_externals}
-    sphinx-build
 
 [testenv:docs]
 sitepackages = {[docsbase]sitepackages}
 deps = {[docsbase]deps}
 whitelist_externals = echo
 commands =
-    echo "sphinx-apidoc --force -o docs/source/modules/ deluge deluge/plugins"
-    echo "sphinx-build -v -E -T -b html -d docs/build/doctrees docs/source docs/build/html"
-    python setup.py build_docs
+    echo -e "sphinx-apidoc --force -o docs/source/modules/ deluge deluge/plugins"\
+        "\n""sphinx-build -v -E -T -b html -d docs/build/doctrees docs/source docs/build/html"
+    python -c "import subprocess, sys; proc = subprocess.Popen(\
+        'python setup.py build_docs', shell=True, stdout=subprocess.PIPE);\
+        out, err = proc.communicate(); print err; sys.exit(bool(err))"
 
 [testenv:docscoverage]
 sitepackages = {[docsbase]sitepackages}