diff --git a/tests/mock_server/h2tls_mock_server.py b/tests/mock_server/h2tls_mock_server.py
index 339bfc1ef..fddbd9d29 100644
--- a/tests/mock_server/h2tls_mock_server.py
+++ b/tests/mock_server/h2tls_mock_server.py
@@ -56,7 +56,6 @@ def __init__(self):
         self.stream_data = {}
         self.flow_control_futures = {}
         self.file_path = None
-        self.num_sentence_received = {}
         self.raw_headers = None
         self.download_test_length = 2500000000
         self.out_bytes_per_second = 900
@@ -118,7 +117,7 @@ def handle_request_echo(self, stream_id: int, request_data: RequestData):
         - x-repeat-data: <bytes> - Triggers send_repeat_data() with specified length
         - x-slow-response: true - Triggers send_slow_repeat_data() instead (requires x-repeat-data)
         - x-throughput-bps: <number> - Override throughput for slow response (default 900)
-        
+
         Without special headers, echoes request headers and body as JSON.
         """
         headers_dict = dict(self.raw_headers)
@@ -128,7 +127,7 @@ def handle_request_echo(self, stream_id: int, request_data: RequestData):
             response_headers = [(':status', expect_status)]
             self.conn.send_headers(stream_id, response_headers, end_stream=True)
             return
-        
+
         # Check for x-repeat-data header
         repeat_data_header = headers_dict.get('x-repeat-data')
         if repeat_data_header:
@@ -136,7 +135,7 @@ def handle_request_echo(self, stream_id: int, request_data: RequestData):
                 length = int(repeat_data_header)
                 response_headers = [(':status', '200')]
                 self.conn.send_headers(stream_id, response_headers, end_stream=False)
-                
+
                 # Check for slow response
                 if headers_dict.get('x-slow-response') == 'true':
                     # Check for custom throughput
@@ -149,7 +148,7 @@ def handle_request_echo(self, stream_id: int, request_data: RequestData):
                 return
             except ValueError:
                 pass  # Fall through to echo behavior
-        
+
         # Check for upload test (don't echo body, just return byte count)
         if headers_dict.get('x-upload-test') == 'true':
             body_bytes = request_data.data.getvalue()
@@ -158,7 +157,7 @@ def handle_request_echo(self, stream_id: int, request_data: RequestData):
             self.conn.send_headers(stream_id, response_headers, end_stream=False)
             asyncio.ensure_future(self.send_data(data, stream_id))
             return
-        
+
         # Default echo behavior
         response_headers = [(':status', '200')]
         # Filter out headers that shouldn't be echoed back
@@ -167,18 +166,18 @@ def handle_request_echo(self, stream_id: int, request_data: RequestData):
             # Response headers back and exclude pseudo headers and problematic headers
             if i[0][0] != ':' and i[0].lower() not in skip_headers:
                 response_headers.append(i)
-        
+
         body_bytes = request_data.data.getvalue()
-        
+
         body = body_bytes.decode('utf-8')
 
         data = json.dumps(
             {"body": body, "bytes": len(body_bytes)}, indent=4,
         ).encode("utf8")
-        
+
         # Add correct content-length for our response
         response_headers.append(('content-length', str(len(data))))
-        
+
         self.conn.send_headers(stream_id, response_headers, end_stream=False)
         asyncio.ensure_future(self.send_data(data, stream_id))
 
diff --git a/tests/test_connection_monitor.c b/tests/test_connection_monitor.c
index 4937b15a2..c691126ba 100644
--- a/tests/test_connection_monitor.c
+++ b/tests/test_connection_monitor.c
@@ -231,7 +231,7 @@ static int s_do_http_monitoring_test(
 }
 
 static struct aws_http_connection_monitoring_options s_test_options = {
-    .allowable_throughput_failure_interval_seconds = 1,
+    .allowable_throughput_failure_interval_seconds = 2,
     .minimum_throughput_bytes_per_second = 1000,
 };
 
diff --git a/tests/test_stream_manager.c b/tests/test_stream_manager.c
index 9de6996be..9142c7865 100644
--- a/tests/test_stream_manager.c
+++ b/tests/test_stream_manager.c
@@ -1770,7 +1770,7 @@ TEST_CASE(localhost_integ_h2_sm_connection_monitor_kill_slow_connection) {
     (void)ctx;
     struct aws_byte_cursor uri_cursor = aws_byte_cursor_from_c_str("https://localhost:3443/echo");
     struct aws_http_connection_monitoring_options monitor_opt = {
-        .allowable_throughput_failure_interval_seconds = 1,
+        .allowable_throughput_failure_interval_seconds = 2,
         .minimum_throughput_bytes_per_second = 1000,
     };
     struct sm_tester_options options = {