diff --git a/pyproject.toml b/pyproject.toml
index 258c8d4c4..c1a2959fc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Topic :: Scientific/Engineering",]
 requires-python = ">=3.9"
-dependencies = [ "qcodes>=0.37.0", "versioningit>=2.0.1", "packaging"]
+dependencies = [ "qcodes>=0.42.0", "versioningit>=2.0.1", "packaging"]
 dynamic = [ "version",]
 
 [[project.maintainers]]
diff --git a/qcodes_contrib_drivers/tests/test_Keysight_M3201A.py b/qcodes_contrib_drivers/tests/test_Keysight_M3201A.py
index c33137d89..836f7b919 100644
--- a/qcodes_contrib_drivers/tests/test_Keysight_M3201A.py
+++ b/qcodes_contrib_drivers/tests/test_Keysight_M3201A.py
@@ -1,8 +1,8 @@
 try:
-    from qcodes.tests.driver_test_case import DriverTestCase
+    from qcodes.extensions import DriverTestCase
 except ImportError:
-    # qcodes < 0.37
-    from qcodes.instrument_drivers.test import DriverTestCase  # type: ignore[import-not-found,no-redef]
+    # qcodes < 0.42.0
+    from qcodes.tests.driver_test_case import DriverTestCase
 import unittest
 
 try: