diff --git a/plan.fmf b/plan.fmf
index 52011e3..b890506 100644
--- a/plan.fmf
+++ b/plan.fmf
@@ -33,7 +33,7 @@ discover:
     tests:
     - name: smoke36
       path: /smoke
-      test:  VERSION=3.6 INSTALL_OR_SKIP=true TOX_REQUIRES="virtualenv<20.22.0" ./venv.sh
+      test:  VERSION=3.6 INSTALL_OR_SKIP=true ./venv.sh
     - name: smoke39
       path: /smoke
       test:  VERSION=3.9 INSTALL_OR_SKIP=true ./venv.sh