diff --git a/noxfile.py b/noxfile.py
index 31b1a2ee4d..23b817126c 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -152,7 +152,7 @@ def cover(session):
     test runs (not system test runs), and then erases coverage data.
     """
     session.install("coverage", "pytest-cov")
-    session.run("coverage", "report", "--show-missing", "--fail-under=97")
+    session.run("coverage", "report", "--show-missing", "--fail-under=100")
 
     session.run("coverage", "erase")
 
diff --git a/synth.py b/synth.py
index 8a363c5922..169eb7c7de 100644
--- a/synth.py
+++ b/synth.py
@@ -74,7 +74,7 @@
     unit_test_python_versions=["3.6", "3.7", "3.8"],
     system_test_python_versions=["3.7"],
     microgenerator=True,
-    cov_level=97,  # https://github.com/googleapis/python-firestore/issues/190
+    cov_level=100,
 )
 
 s.move(