diff --git a/.github/workflows/django-spanner-django6.0_tests.yml b/.github/workflows/django-spanner-django6.0_tests.yml
index 6a8d33eea262..4f0515222386 100644
--- a/.github/workflows/django-spanner-django6.0_tests.yml
+++ b/.github/workflows/django-spanner-django6.0_tests.yml
@@ -79,7 +79,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7
         with:
-          python-version: "3.12"
+          python-version: "3.15"
       - name: Run Django tests
         run: sh django_test_suite_6.0.sh
         env:
diff --git a/.github/workflows/sqlalchemy-spanner-compliance-tests-against-emulator.yml b/.github/workflows/sqlalchemy-spanner-compliance-tests-against-emulator.yml
index 1ed6d4908155..d7017f45561c 100644
--- a/.github/workflows/sqlalchemy-spanner-compliance-tests-against-emulator.yml
+++ b/.github/workflows/sqlalchemy-spanner-compliance-tests-against-emulator.yml
@@ -55,7 +55,7 @@ jobs:
       - name: Set up Python 3.14
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7
         with:
-          python-version: "3.14"
+          python-version: "3.15"
       - name: Install nox
         run: python -m pip install nox
       - name: Run nox compliance_test_20
diff --git a/packages/google-crc32c/scripts/requirements.txt b/packages/google-crc32c/scripts/requirements.txt
index 6fab89625b0d..8d79efeeb9b6 100644
--- a/packages/google-crc32c/scripts/requirements.txt
+++ b/packages/google-crc32c/scripts/requirements.txt
@@ -35,9 +35,9 @@ wheel==0.48.0 \
     # via -r requirements.in
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==26.2 \
-    --hash=sha256:2d8542afcc84cdd8e846c2b36b2861fad1da376dd98f8e7113e9108a3c331690 \
-    --hash=sha256:931c303696af6fa3417112103b1cad26890e5a07eccb5b99783700e33f2b8aad
+pip==26.2.1 \
+    --hash=sha256:71138adf1f4ca900cdb7d289c21b7494329f2332b6d85f0e1c42108c0384ed3e \
+    --hash=sha256:f6ad667e89a1fe78046c8f13232b247200f5258d7828f3f7883d660878e0813f
     # via -r requirements.in
 setuptools==84.0.0 \
     --hash=sha256:51a52592b3b99e102b609654876bd65f19f999935166d1352678931132b0c670 \
diff --git a/packages/sqlalchemy-spanner/noxfile.py b/packages/sqlalchemy-spanner/noxfile.py
index c05f20d74300..08a6817e416a 100644
--- a/packages/sqlalchemy-spanner/noxfile.py
+++ b/packages/sqlalchemy-spanner/noxfile.py
@@ -132,7 +132,7 @@ class = StreamHandler
 SYSTEM_TEST_PYTHON_VERSIONS = ["3.12"]
 SYSTEM_COMPLIANCE_MIGRATION_TEST_PYTHON_VERSIONS = ["3.12", "3.14"]
 DEFAULT_PYTHON_VERSION = "3.14"
-DEFAULT_PYTHON_VERSION_FOR_SQLALCHEMY_20 = "3.14"
+DEFAULT_PYTHON_VERSION_FOR_SQLALCHEMY_20 = "3.15"
 
 
 nox.options.sessions = [
@@ -144,7 +144,7 @@ class = StreamHandler
 ]
 
 
-@nox.session(python=DEFAULT_PYTHON_VERSION_FOR_SQLALCHEMY_20)
+@nox.session(python=DEFAULT_PYTHON_VERSION)
 def lint(session):
     """Run linters.
 
@@ -181,7 +181,7 @@ def lint(session):
     )
 
 
-@nox.session(python=DEFAULT_PYTHON_VERSION_FOR_SQLALCHEMY_20)
+@nox.session(python=DEFAULT_PYTHON_VERSION)
 def lint_setup_py(session):
     """Verify that setup.py is valid (including RST check)."""
     session.install("docutils", "pygments", "setuptools")
@@ -429,7 +429,9 @@ def unit(session, test_type):
         test_type == "mockserver"
         and session.python != DEFAULT_PYTHON_VERSION_FOR_SQLALCHEMY_20
     ):
-        session.skip("mockserver tests only run on python 3.14")
+        session.skip(
+            f"mockserver tests only run on python {DEFAULT_PYTHON_VERSION_FOR_SQLALCHEMY_20}"
+        )
 
     if test_type == "mockserver":
         mockserver(session)