diff --git a/packages/google-crc32c/noxfile.py b/packages/google-crc32c/noxfile.py
index b44c502ccd0c..2a268734c5b5 100644
--- a/packages/google-crc32c/noxfile.py
+++ b/packages/google-crc32c/noxfile.py
@@ -25,7 +25,7 @@
 
 # Constants
 DEFAULT_PYTHON_VERSION = "3.14"
-UNIT_TEST_PYTHON_VERSIONS = ["3.10", "3.11", "3.12", "3.13", "3.14"]
+UNIT_TEST_PYTHON_VERSIONS = ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
 ALL_PYTHON = list(UNIT_TEST_PYTHON_VERSIONS)
 
 FLAKE8_VERSION = "flake8==6.1.0"