diff --git a/tests/asyncio/test_client.py b/tests/asyncio/test_client.py
index 6f6070c6..827faa42 100644
--- a/tests/asyncio/test_client.py
+++ b/tests/asyncio/test_client.py
@@ -554,7 +554,7 @@ async def test_reject_invalid_server_certificate(self):
                 async with connect(get_uri(server)):
                     self.fail("did not raise")
             self.assertIn(
-                "certificate verify failed: self signed certificate",
+                "self signed certificate",
                 str(raised.exception).replace("-", " "),
             )
 
@@ -568,7 +568,7 @@ async def test_reject_invalid_server_hostname(self):
                 ):
                     self.fail("did not raise")
             self.assertIn(
-                "certificate verify failed: Hostname mismatch",
+                "Hostname mismatch",
                 str(raised.exception),
             )
 
@@ -878,7 +878,7 @@ async def test_https_proxy_invalid_proxy_certificate(self):
             async with connect("wss://example.com/"):
                 self.fail("did not raise")
         self.assertIn(
-            "certificate verify failed: unable to get local issuer certificate",
+            "unable to get local issuer certificate",
             str(raised.exception),
         )
 
@@ -891,7 +891,7 @@ async def test_https_proxy_invalid_server_certificate(self):
                 async with connect(get_uri(server), proxy_ssl=self.proxy_context):
                     self.fail("did not raise")
         self.assertIn(
-            "certificate verify failed: self signed certificate",
+            "self signed certificate",
             str(raised.exception).replace("-", " "),
         )
         self.assertNumFlows(1)
diff --git a/tests/sync/test_client.py b/tests/sync/test_client.py
index d4d42c31..401fcce3 100644
--- a/tests/sync/test_client.py
+++ b/tests/sync/test_client.py
@@ -328,7 +328,7 @@ def test_reject_invalid_server_certificate(self):
                 with connect(get_uri(server)):
                     self.fail("did not raise")
             self.assertIn(
-                "certificate verify failed: self signed certificate",
+                "self signed certificate",
                 str(raised.exception).replace("-", " "),
             )
 
@@ -342,7 +342,7 @@ def test_reject_invalid_server_hostname(self):
                 ):
                     self.fail("did not raise")
             self.assertIn(
-                "certificate verify failed: Hostname mismatch",
+                "Hostname mismatch",
                 str(raised.exception),
             )
 
@@ -615,7 +615,7 @@ def test_https_proxy_invalid_proxy_certificate(self):
             with connect("wss://example.com/"):
                 self.fail("did not raise")
         self.assertIn(
-            "certificate verify failed: unable to get local issuer certificate",
+            "unable to get local issuer certificate",
             str(raised.exception),
         )
         self.assertNumFlows(0)
@@ -629,7 +629,7 @@ def test_https_proxy_invalid_server_certificate(self):
                 with connect(get_uri(server), proxy_ssl=self.proxy_context):
                     self.fail("did not raise")
         self.assertIn(
-            "certificate verify failed: self signed certificate",
+            "self signed certificate",
             str(raised.exception).replace("-", " "),
         )
         self.assertNumFlows(1)
diff --git a/tests/trio/test_client.py b/tests/trio/test_client.py
index 6afd35f8..45e290af 100644
--- a/tests/trio/test_client.py
+++ b/tests/trio/test_client.py
@@ -567,7 +567,7 @@ async def test_reject_invalid_server_certificate(self):
                 ssl.SSLCertVerificationError,
             )
             self.assertIn(
-                "certificate verify failed: self signed certificate",
+                "self signed certificate",
                 str(raised.exception.__cause__).replace("-", " "),
             )
 
@@ -587,7 +587,7 @@ async def test_reject_invalid_server_hostname(self):
                 ssl.SSLCertVerificationError,
             )
             self.assertIn(
-                "certificate verify failed: Hostname mismatch",
+                "Hostname mismatch",
                 str(raised.exception.__cause__),
             )
 
@@ -884,7 +884,7 @@ async def test_https_proxy_invalid_proxy_certificate(self):
                 self.fail("did not raise")
         self.assertIsInstance(raised.exception.__cause__, ssl.SSLCertVerificationError)
         self.assertIn(
-            "certificate verify failed: unable to get local issuer certificate",
+            "unable to get local issuer certificate",
             str(raised.exception.__cause__),
         )
 
@@ -900,7 +900,7 @@ async def test_https_proxy_invalid_server_certificate(self):
                     self.fail("did not raise")
         self.assertIsInstance(raised.exception.__cause__, ssl.SSLCertVerificationError)
         self.assertIn(
-            "certificate verify failed: self signed certificate",
+            "self signed certificate",
             str(raised.exception.__cause__).replace("-", " "),
         )
         self.assertNumFlows(1)