diff --git a/adafruit_connection_manager.py b/adafruit_connection_manager.py
index b195d19..25b057d 100644
--- a/adafruit_connection_manager.py
+++ b/adafruit_connection_manager.py
@@ -204,6 +204,11 @@ def _free_sockets(self, force: bool = False) -> None:
             for socket in open_sockets:
                 self.close_socket(socket)
 
+    def _register_connected_socket(self, key, socket):
+        """Register a socket as managed."""
+        self._key_by_managed_socket[socket] = key
+        self._managed_socket_by_key[key] = socket
+
     def _get_connected_socket(  # pylint: disable=too-many-arguments
         self,
         addr_info: List[Tuple[int, int, int, str, Tuple[str, int]]],
@@ -264,10 +269,6 @@ def free_socket(self, socket: SocketType) -> None:
             raise RuntimeError("Socket not managed")
         self._available_sockets.add(socket)
 
-    def _register_connected_socket(self, key, socket):
-        self._key_by_managed_socket[socket] = key
-        self._managed_socket_by_key[key] = socket
-
     # pylint: disable=too-many-arguments
     def get_socket(
         self,
@@ -290,7 +291,7 @@ def get_socket(
           used for multiple simultaneous connections to the same host
         :param float timeout: how long to wait to connect
         :param bool is_ssl: ``True`` If the connection is to be over SSL;
-          automatically set when ``proto`` is ``"https:"`
+          automatically set when ``proto`` is ``"https:"``
         :param Optional[SSLContextType]: SSL context to use when making SSL requests
         """
         if session_id:
diff --git a/tests/get_socket_test.py b/tests/get_socket_test.py
index 9abbf98..46d053b 100644
--- a/tests/get_socket_test.py
+++ b/tests/get_socket_test.py
@@ -91,7 +91,7 @@ def test_get_socket_not_flagged_free():
     # get a socket for the same host, should be a different one
     with pytest.raises(RuntimeError) as context:
         socket = connection_manager.get_socket(mocket.MOCK_HOST_1, 80, "http:")
-    assert "Socket already connected" in str(context)
+    assert "An existing socket is already connected" in str(context)
 
 
 def test_get_socket_os_error():
@@ -105,9 +105,8 @@ def test_get_socket_os_error():
     connection_manager = adafruit_connection_manager.ConnectionManager(mock_pool)
 
     # try to get a socket that returns a OSError
-    with pytest.raises(RuntimeError) as context:
+    with pytest.raises(OSError):
         connection_manager.get_socket(mocket.MOCK_HOST_1, 80, "http:")
-    assert "Error connecting socket: OSError" in str(context)
 
 
 def test_get_socket_runtime_error():
@@ -121,9 +120,8 @@ def test_get_socket_runtime_error():
     connection_manager = adafruit_connection_manager.ConnectionManager(mock_pool)
 
     # try to get a socket that returns a RuntimeError
-    with pytest.raises(RuntimeError) as context:
+    with pytest.raises(RuntimeError):
         connection_manager.get_socket(mocket.MOCK_HOST_1, 80, "http:")
-    assert "Error connecting socket: RuntimeError" in str(context)
 
 
 def test_get_socket_connect_memory_error():
@@ -139,9 +137,8 @@ def test_get_socket_connect_memory_error():
     connection_manager = adafruit_connection_manager.ConnectionManager(mock_pool)
 
     # try to connect a socket that returns a MemoryError
-    with pytest.raises(RuntimeError) as context:
+    with pytest.raises(MemoryError):
         connection_manager.get_socket(mocket.MOCK_HOST_1, 80, "http:")
-    assert "Error connecting socket: MemoryError" in str(context)
 
 
 def test_get_socket_connect_os_error():
@@ -157,9 +154,8 @@ def test_get_socket_connect_os_error():
     connection_manager = adafruit_connection_manager.ConnectionManager(mock_pool)
 
     # try to connect a socket that returns a OSError
-    with pytest.raises(RuntimeError) as context:
+    with pytest.raises(OSError):
         connection_manager.get_socket(mocket.MOCK_HOST_1, 80, "http:")
-    assert "Error connecting socket: OSError" in str(context)
 
 
 def test_get_socket_runtime_error_ties_again_at_least_one_free():
@@ -211,9 +207,8 @@ def test_get_socket_runtime_error_ties_again_only_once():
     free_sockets_mock.assert_not_called()
 
     # try to get a socket that returns a RuntimeError twice
-    with pytest.raises(RuntimeError) as context:
+    with pytest.raises(RuntimeError):
         connection_manager.get_socket(mocket.MOCK_HOST_2, 80, "http:")
-    assert "Error connecting socket: error 2, first error: error 1" in str(context)
     free_sockets_mock.assert_called_once()
 
 
@@ -248,8 +243,7 @@ def test_fake_ssl_context_connect_error(  # pylint: disable=unused-argument
     ssl_context = adafruit_connection_manager.get_radio_ssl_context(radio)
     connection_manager = adafruit_connection_manager.ConnectionManager(mock_pool)
 
-    with pytest.raises(RuntimeError) as context:
+    with pytest.raises(OSError):
         connection_manager.get_socket(
             mocket.MOCK_HOST_1, 443, "https:", ssl_context=ssl_context
         )
-    assert "Error connecting socket: [Errno 12] RuntimeError" in str(context)