diff --git a/tox.ini b/tox.ini
index 5690272..098930c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,22 +36,12 @@ commands=
 
 
 [testenv:releasenotes]
-# 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 -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 
 # environment used by the -infra templated docs job
 [testenv:venv]
-# NOTE(jaegerandi): 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 =
     {posargs}
 
@@ -151,11 +141,6 @@ commands =
 
 
 [testenv:functional]
-# NOTE(odyssey4me): this target does not use constraints because
-# it doesn't work in OpenStack-CI yet. Once that's fixed, we can
-# drop the install_command.
-install_command =
-    pip install -U --force-reinstall {opts} {packages}
 deps =
     {[testenv:ansible]deps}
 setenv =