diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 02325384..7f959a0a 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -83,7 +83,7 @@ task during `setup`_—for your active shell session using the following command
     source venv/bin/activate
 
 (If you use ``virtualenvwrapper``, you can also use ``workon httpie`` to
-active the environment — we have created a symlink for you. It’s a bit of
+activate the environment — we have created a symlink for you. It’s a bit of
 a hack but it works™.)
 
 You should now see ``(httpie)`` next to your shell prompt, and
diff --git a/Makefile b/Makefile
index d40fa75c..5c869764 100644
--- a/Makefile
+++ b/Makefile
@@ -100,7 +100,7 @@ test-tox: uninstall-httpie install
 	@echo
 
 
-test-sdist: clean uninstall-httpie
+test-sdist: clean venv
 	@echo $(H1)Testing sdist build an installation$(H1END)
 	$(VENV_PYTHON) setup.py sdist
 	$(VENV_PIP) install --force-reinstall --upgrade dist/*.gz
@@ -108,8 +108,9 @@ test-sdist: clean uninstall-httpie
 	@echo
 
 
-test-bdist-wheel: clean uninstall-httpie
+test-bdist-wheel: clean venv
 	@echo $(H1)Testing wheel build an installation$(H1END)
+	$(VENV_PIP) install wheel
 	$(VENV_PYTHON) setup.py bdist_wheel
 	$(VENV_PIP) install --force-reinstall --upgrade dist/*.whl
 	$(VENV_BIN)/http --version