diff --git a/ext/opentelemetry-ext-http-requests/setup.cfg b/ext/opentelemetry-ext-http-requests/setup.cfg
index 01ee81fda1f..7d41a525cd9 100644
--- a/ext/opentelemetry-ext-http-requests/setup.cfg
+++ b/ext/opentelemetry-ext-http-requests/setup.cfg
@@ -37,7 +37,7 @@ classifiers =
 python_requires = >=3.4
 package_dir=
     =src
-packages=find:
+packages=find_namespace:
 install_requires =
     opentelemetry-api >= 0.1.dev0
     requests ~= 2.0
diff --git a/ext/opentelemetry-ext-wsgi/setup.cfg b/ext/opentelemetry-ext-wsgi/setup.cfg
index a77e9fd1fb3..4405e37a302 100644
--- a/ext/opentelemetry-ext-wsgi/setup.cfg
+++ b/ext/opentelemetry-ext-wsgi/setup.cfg
@@ -37,7 +37,7 @@ classifiers =
 python_requires = >=3.4
 package_dir=
     =src
-packages=find:
+packages=find_namespace:
 install_requires =
     opentelemetry-api
 
diff --git a/tox.ini b/tox.ini
index 5cbdfa2d5e9..acf1bcb367c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,12 +26,13 @@ changedir =
   test-ext-http-requests: ext/opentelemetry-ext-http-requests/tests
 
 commands_pre =
+; Install without -e to test the actual installation
   python -m pip install -U pip setuptools wheel
-  test: pip install -e {toxinidir}/opentelemetry-api
-  test-sdk: pip install -e {toxinidir}/opentelemetry-sdk
-  ext: pip install -e {toxinidir}/opentelemetry-api
-  wsgi: pip install -e {toxinidir}/ext/opentelemetry-ext-wsgi
-  http-requests: pip install -e {toxinidir}/ext/opentelemetry-ext-http-requests
+  test: pip install {toxinidir}/opentelemetry-api
+  test-sdk: pip install {toxinidir}/opentelemetry-sdk
+  ext: pip install {toxinidir}/opentelemetry-api
+  wsgi: pip install {toxinidir}/ext/opentelemetry-ext-wsgi
+  http-requests: pip install {toxinidir}/ext/opentelemetry-ext-http-requests
 
 commands =
   mypy: mypy --namespace-packages opentelemetry-api/src/opentelemetry/