diff --git a/gitlab/v4/objects/users.py b/gitlab/v4/objects/users.py
index 69d72e9d7..69d875ed9 100644
--- a/gitlab/v4/objects/users.py
+++ b/gitlab/v4/objects/users.py
@@ -3,7 +3,7 @@
 https://docs.gitlab.com/ee/api/users.html
 https://docs.gitlab.com/ee/api/projects.html#list-projects-starred-by-a-user
 """
-from typing import Any, cast, Dict, List, Union
+from typing import Any, cast, Dict, List, Optional, Union
 
 import requests
 
@@ -163,7 +163,7 @@ class User(SaveMixin, ObjectDeleteMixin, RESTObject):
 
     @cli.register_custom_action("User")
     @exc.on_http_error(exc.GitlabBlockError)
-    def block(self, **kwargs: Any) -> Union[Dict[str, Any], requests.Response]:
+    def block(self, **kwargs: Any) -> Optional[bool]:
         """Block the user.
 
         Args:
@@ -177,7 +177,11 @@ def block(self, **kwargs: Any) -> Union[Dict[str, Any], requests.Response]:
             Whether the user status has been changed
         """
         path = f"/users/{self.encoded_id}/block"
-        server_data = self.manager.gitlab.http_post(path, **kwargs)
+        # NOTE: Undocumented behavior of the GitLab API is that it returns a
+        # boolean or None
+        server_data = cast(
+            Optional[bool], self.manager.gitlab.http_post(path, **kwargs)
+        )
         if server_data is True:
             self._attrs["state"] = "blocked"
         return server_data
@@ -220,7 +224,7 @@ def unfollow(self, **kwargs: Any) -> Union[Dict[str, Any], requests.Response]:
 
     @cli.register_custom_action("User")
     @exc.on_http_error(exc.GitlabUnblockError)
-    def unblock(self, **kwargs: Any) -> Union[Dict[str, Any], requests.Response]:
+    def unblock(self, **kwargs: Any) -> Optional[bool]:
         """Unblock the user.
 
         Args:
@@ -234,7 +238,11 @@ def unblock(self, **kwargs: Any) -> Union[Dict[str, Any], requests.Response]:
             Whether the user status has been changed
         """
         path = f"/users/{self.encoded_id}/unblock"
-        server_data = self.manager.gitlab.http_post(path, **kwargs)
+        # NOTE: Undocumented behavior of the GitLab API is that it returns a
+        # boolean or None
+        server_data = cast(
+            Optional[bool], self.manager.gitlab.http_post(path, **kwargs)
+        )
         if server_data is True:
             self._attrs["state"] = "active"
         return server_data
diff --git a/pyproject.toml b/pyproject.toml
index dcb578c69..43359e986 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,6 +13,8 @@ disallow_incomplete_defs = true
 disallow_subclassing_any = true
 disallow_untyped_decorators = true
 disallow_untyped_defs = true
+no_implicit_reexport = true
+strict_equality = true
 warn_redundant_casts = true
 warn_unused_configs = true
 warn_unused_ignores = true
@@ -21,8 +23,6 @@ warn_unused_ignores = true
 # disallow_any_generics = true
 # disallow_untyped_calls = true
 # no_implicit_optional = true
-no_implicit_reexport = true
-# strict_equality = true
 # warn_return_any = true
 
 [[tool.mypy.overrides]] # Overrides for currently untyped modules
diff --git a/tests/functional/api/test_users.py b/tests/functional/api/test_users.py
index bdee1304d..a099e8fb2 100644
--- a/tests/functional/api/test_users.py
+++ b/tests/functional/api/test_users.py
@@ -28,14 +28,26 @@ def test_create_user(gl, fixture_dir):
 
 
 def test_block_user(gl, user):
-    user.block()
+    result = user.block()
+    assert result is True
     users = gl.users.list(blocked=True)
     assert user in users
 
-    user.unblock()
+    # block again
+    result = user.block()
+    # Trying to block an already blocked user returns None
+    assert result is None
+
+    result = user.unblock()
+    assert result is True
     users = gl.users.list(blocked=False)
     assert user in users
 
+    # unblock again
+    result = user.unblock()
+    # Trying to unblock an already blocked user returns False
+    assert result is False
+
 
 def test_ban_user(gl, user):
     user.ban()