diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5dc3fe1..32be2e0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -33,7 +33,7 @@ jobs:
       run: |
         pytest
     - name: run mypy
-      run: mypy sqlite_utils
+      run: mypy sqlite_utils tests
     - name: run flake8
       run: flake8
     - name: Check formatting
diff --git a/setup.py b/setup.py
index 65fe6f7..0d3e456 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@ setup(
     extras_require={
         "test": ["pytest", "black", "hypothesis"],
         "docs": ["sphinx_rtd_theme", "sphinx-autobuild", "codespell"],
-        "mypy": ["mypy", "types-click", "types-tabulate", "types-python-dateutil"],
+        "mypy": ["mypy", "types-click", "types-tabulate", "types-python-dateutil", "data-science-types"],
         "flake8": ["flake8"],
     },
     entry_points="""
diff --git a/sqlite_utils/db.py b/sqlite_utils/db.py
index e4c1d5c..4677733 100644
--- a/sqlite_utils/db.py
+++ b/sqlite_utils/db.py
@@ -197,7 +197,7 @@ if np:
 
 # If pandas is available, add more types
 if pd:
-    COLUMN_TYPE_MAPPING.update({pd.Timestamp: "TEXT"})
+    COLUMN_TYPE_MAPPING.update({pd.Timestamp: "TEXT"})  # type: ignore
 
 
 class AlterError(Exception):
diff --git a/tests/test_create.py b/tests/test_create.py
index ff36f90..58dda95 100644
--- a/tests/test_create.py
+++ b/tests/test_create.py
@@ -20,9 +20,9 @@ import uuid
 from .utils import collapse_whitespace
 
 try:
-    import pandas as pd
+    import pandas as pd  # type: ignore
 except ImportError:
-    pd = None
+    pd = None  # type: ignore
 
 
 def test_create_table(fresh_db):