diff --git a/tox.ini b/tox.ini
index 2257c32c3..36519c0a0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -85,20 +85,12 @@ commands =
 [testenv:api-guide]
 # This environment is called from CI scripts to test and publish
 # the API Guide to developer.openstack.org.
-# NOTE(sdague): this target does not use constraints because
-# upstream infra does not yet support it. Once that's fixed, we can
-# drop the install_command.
-install_command = pip install -U --force-reinstall {opts} {packages}
 commands =
   sphinx-build -W -b html -d api-guide/build/doctrees api-guide/source api-guide/build/html
 
 [testenv:api-ref]
 # This environment is called from CI scripts to test and publish
 # the API Ref to developer.openstack.org.
-# NOTE(sdague): this target does not use constraints because
-# upstream infra does not yet support it. Once that's fixed, we can
-# drop the install_command.
-install_command = pip install -U --force-reinstall {opts} {packages}
 commands =
   rm -rf api-ref/build
   sphinx-build -W -b html -d api-ref/build/doctrees api-ref/source api-ref/build/html