diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index cb89b2e32..a67698f8f 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -1,3 +1,3 @@
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:ec49167c606648a063d1222220b48119c912562849a0528f35bfb592a9f72737
+  digest: sha256:74124fe59b8859f30143dcdea7b78300046d97de816dc53c0e381308a5f4f8bc
diff --git a/noxfile.py b/noxfile.py
index 4341577a0..931c23ad2 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -27,7 +27,6 @@
 BLACK_VERSION = "black==19.10b0"
 BLACK_PATHS = ["docs", "google", "tests", "noxfile.py", "setup.py"]
 
-MYPY_VERSION = "mypy==0.910"
 PYTYPE_VERSION = "pytype==2021.4.9"
 
 
@@ -45,7 +44,6 @@
     "lint",
     "lint_setup_py",
     "blacken",
-    "mypy",
     "pytype",
     "docs",
 ]
@@ -54,24 +52,10 @@
 nox.options.error_on_missing_interpreters = True
 
 
-@nox.session(python=DEFAULT_PYTHON_VERSION)
-def mypy(session):
-    """Run type checks with mypy."""
-    session.install("-e", ".")
-    session.install(MYPY_VERSION)
-
-    # Just install the type info directly, since "mypy --install-types" might require
-    # an additional pass.
-    session.install("types-protobuf", "types-setuptools")
-
-    # Check the hand-written layer.
-    session.run("mypy", "google/cloud")
-
-
 @nox.session(python=DEFAULT_PYTHON_VERSION)
 def pytype(session):
     """Run type checks."""
-    session.install("-e", ".")
+    session.install("-e", ".[all]")
     session.install(PYTYPE_VERSION)
     session.run("pytype")