diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b5b8cff..b34e1c0 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-24.04
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14', 'pypy3.11']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14', '3.15', 'pypy3.11']
     env:
       # Configure a constant location for the uv cache
       UV_CACHE_DIR: /tmp/.uv-cache
diff --git a/mocket/__init__.py b/mocket/__init__.py
index fc9bf0d..7155d22 100644
--- a/mocket/__init__.py
+++ b/mocket/__init__.py
@@ -33,4 +33,4 @@
     "FakeSSLContext",
 )
 
-__version__ = "3.14.5"
+__version__ = "3.15.0"
diff --git a/pyproject.toml b/pyproject.toml
index a3ad9d4..3b7eed1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
+    "Programming Language :: Python :: 3.15",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Topic :: Software Development",
diff --git a/tests/test_http.py b/tests/test_http.py
index fbb0557..af880b1 100644
--- a/tests/test_http.py
+++ b/tests/test_http.py
@@ -70,8 +70,8 @@ class TrueHttpEntryTestCase(HttpTestCase):
     @mocketize
     def test_truesendall(self):
         url = "http://httpbin.local/ip"
-        resp = urlopen(url)
-        self.assertEqual(resp.code, 200)
+        with urlopen(url) as resp:
+            self.assertEqual(resp.code, 200)
         resp = requests.get(url)
         self.assertEqual(resp.status_code, 200)
 
@@ -81,10 +81,11 @@ def test_truesendall_with_recording(self):
         ):
             url = "http://httpbin.local/ip"
 
-            urlopen(url)
+            with urlopen(url):
+                pass
             requests.get(url)
-            resp = urlopen(url)
-            self.assertEqual(resp.code, 200)
+            with urlopen(url) as resp:
+                self.assertEqual(resp.code, 200)
             resp = requests.get(url)
             self.assertEqual(resp.status_code, 200)
             assert "origin" in resp.json()
@@ -233,10 +234,10 @@ def test_sendall_double(self):
             Entry.GET, "http://testme.org/", Response(status=404), Response()
         )
         self.assertRaises(HTTPError, urlopen, "http://testme.org/")
-        response = urlopen("http://testme.org/")
-        self.assertEqual(response.code, 200)
-        response = urlopen("http://testme.org/")
-        self.assertEqual(response.code, 200)
+        with urlopen("http://testme.org/") as response:
+            self.assertEqual(response.code, 200)
+        with urlopen("http://testme.org/") as response:
+            self.assertEqual(response.code, 200)
         self.assertEqual(len(Mocket.request_list()), 3)
 
     @mocketize
diff --git a/tests/test_httpx.py b/tests/test_httpx.py
index add53de..a2ba944 100644
--- a/tests/test_httpx.py
+++ b/tests/test_httpx.py
@@ -26,7 +26,7 @@ async def perform_async_transactions():
             assert response.status_code == 404
             assert response.text == body
 
-            response = await client.post(url, data=body * 6)
+            response = await client.post(url, content=body * 6)
             assert response.status_code == 201
             assert response.text == body * 2
 
diff --git a/tests/test_redis.py b/tests/test_redis.py
index fb6ec35..e2174a9 100644
--- a/tests/test_redis.py
+++ b/tests/test_redis.py
@@ -126,7 +126,7 @@ def test_get_unicode(self):
     @mocketize
     def test_hm(self):
         h = {b"f1": b"one", b"f2": b"two"}
-        self.assertTrue(self.rclient.hmset("hash", h))
+        self.assertEqual(self.rclient.hset("hash", mapping=h), len(h))
         self.assertEqual(self.rclient.hgetall("hash"), h)
 
     @mocketize