diff --git a/tox.ini b/tox.ini
index c8299ef..aeb1979 100644
--- a/tox.ini
+++ b/tox.ini
@@ -105,9 +105,9 @@ commands =
 
 [testenv:mypy]
 deps =
-    mypy --strict
+    mypy
 commands =
-    mypy telnetlib3
+    mypy --strict telnetlib3
 
 [testenv:pydocstyle]
 deps =
@@ -170,6 +170,7 @@ commands =
 deps =
     {[testenv:flake8]deps}
     {[testenv:isort_check]deps}
+    {[testenv:mypy]deps}
     {[testenv:pydocstyle]deps}
     {[testenv:pylint]deps}
     {[testenv:codespell]deps}
@@ -177,6 +178,7 @@ commands =
     {[testenv:flake8]commands}
     {[testenv:flake8_tests]commands}
     {[testenv:isort_check]commands}
+    {[testenv:mypy]commands}
     {[testenv:pydocstyle]commands}
     {[testenv:pylint]commands}
     {[testenv:codespell]commands}