diff --git a/noxfile.py b/noxfile.py
index 0086cbf..70b40ff 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -151,6 +151,9 @@ def mypy(session: Session) -> None:
 @nox.parametrize("flask_version", ["2.3", "3.0"])
 def tests(session: Session, flask_version: str) -> None:
     """Run the test suite."""
+    session.install("ipython")
+    session.install("bpython")
+    session.install("ptpython")
     session.install(".")
     session.install("coverage[toml]", "pytest", "pygments")
     session.install(f"flask=={flask_version}")
diff --git a/pyproject.toml b/pyproject.toml
index cb4a538..488511f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -78,7 +78,7 @@ lines_after_imports = 2
 
 [tool.mypy]
 strict = true
-exclude = ["tests"]
+exclude = ["^tests"]
 warn_unreachable = true
 pretty = true
 show_column_numbers = true