diff --git a/gym/core.py b/gym/core.py
index 2b507322e..931770d8c 100644
--- a/gym/core.py
+++ b/gym/core.py
@@ -231,7 +231,7 @@ class Env(Generic[ObsType, ActType]):
             there aren't accidental correlations between multiple generators.
 
         Args:
-            seed(Optional int): The seed value for the random number geneartor
+            seed(Optional int): The seed value for the random number generator
 
         Returns:
             seeds (List[int]): Returns the list of seeds used in this environment's random
diff --git a/py.Dockerfile b/py.Dockerfile
index 0d4c290cb..b8e3a7e39 100644
--- a/py.Dockerfile
+++ b/py.Dockerfile
@@ -14,6 +14,6 @@ ENV LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/root/.mujoco/mujoco210/bin
 COPY . /usr/local/gym/
 WORKDIR /usr/local/gym/
 
-RUN if [ python:$PYTHON_VERSION = "python:3.6.15" ] ; then pip install .[box2d,classic_control,toy_text,other] pytest mock ; else pip install .[testing] ; fi
+RUN if [ python:$PYTHON_VERSION = "python:3.6.15" ] ; then pip install .[box2d,classic_control,toy_text,other] pytest==7.0.1 ; else pip install .[testing] ; fi
 
 ENTRYPOINT ["/usr/local/gym/bin/docker_entrypoint"]
diff --git a/setup.py b/setup.py
index 37e4d7cba..ed8d21f89 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@ extras = {
 testing_group = set(extras.keys()) - {"accept-rom-license", "atari"}
 extras["testing"] = list(
     set(itertools.chain.from_iterable(map(lambda group: extras[group], testing_group)))
-) + ["pytest", "mock"]
+) + ["pytest==7.0.1"]
 
 # All dependency groups - accept rom license as requires user to run
 all_groups = set(extras.keys()) - {"accept-rom-license"}
diff --git a/test_requirements.txt b/test_requirements.txt
index acacae8a0..036602735 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -6,5 +6,4 @@ matplotlib>=3.0
 imageio>=2.14.1
 pygame==2.1.0
 mujoco_py<2.2,>=2.1
-pytest
-mock
+pytest==7.0.1