diff --git a/tests/integration/pyramid_tests.py b/tests/integration/pyramid_tests.py
index ceebff3fd..c4b9c87e4 100644
--- a/tests/integration/pyramid_tests.py
+++ b/tests/integration/pyramid_tests.py
@@ -115,15 +115,15 @@ def _register_mock(context, server_span):
 
     @mock.patch("random.getrandbits")
     def test_no_trace_headers(self, getrandbits):
-        getrandbits.return_value = 1234
+        getrandbits.return_value = 3735928559
         self.test_app.get("/example")
 
         self.assertEqual(self.observer.on_server_span_created.call_count, 1)
 
         context, server_span = self.observer.on_server_span_created.call_args[0]
-        self.assertEqual(server_span.trace_id, "1234")
+        self.assertEqual(server_span.trace_id, "0" * 24 + "DEADBEEF")
         self.assertEqual(server_span.parent_id, None)
-        self.assertEqual(server_span.id, "1234")
+        self.assertEqual(server_span.id, "0" * 8 + "DEADBEEF")
 
         self.assertTrue(self.server_observer.on_start.called)
         self.assertTrue(self.server_observer.on_finish.called)
@@ -222,7 +222,7 @@ def test_exception_in_exception_view_caught(self):
 
     @mock.patch("random.getrandbits")
     def test_distrust_headers(self, getrandbits):
-        getrandbits.return_value = 9999
+        getrandbits.return_value = 3735928559
         self.baseplate_configurator.header_trust_handler.trust_headers = False
 
         self.test_app.get(
@@ -230,9 +230,9 @@ def test_distrust_headers(self, getrandbits):
         )
 
         context, server_span = self.observer.on_server_span_created.call_args[0]
-        self.assertEqual(server_span.trace_id, str(getrandbits.return_value))
+        self.assertEqual(server_span.trace_id, "0" * 24 + "DEADBEEF")
         self.assertEqual(server_span.parent_id, None)
-        self.assertEqual(server_span.id, str(getrandbits.return_value))
+        self.assertEqual(server_span.id, "0" * 8 + "DEADBEEF")
 
     def test_local_trace_in_context(self):
         self.test_app.get("/trace_context")
diff --git a/tests/integration/tracing_tests.py b/tests/integration/tracing_tests.py
index 7c00f781e..0ad0c8be9 100644
--- a/tests/integration/tracing_tests.py
+++ b/tests/integration/tracing_tests.py
@@ -90,7 +90,7 @@ def test_trace_on_inbound_request(self):
             span = self.server_span_observer._serialize()
             self.assertEqual(span["name"], "example")
             self.assertEqual(len(span["annotations"]), 2)
-            self.assertEqual(span["parentId"], 0)
+            self.assertFalse("parentId" in span)
 
     def test_local_tracing_embedded(self):
         with mock.patch.object(
diff --git a/tests/unit/observers/tracing_tests.py b/tests/unit/observers/tracing_tests.py
index 3f9fdfaad..b0e9fb458 100644
--- a/tests/unit/observers/tracing_tests.py
+++ b/tests/unit/observers/tracing_tests.py
@@ -245,10 +245,10 @@ def test_to_span_obj_sets_parent_id(self):
         span_obj = self.test_span_observer._to_span_obj([], [])
         self.assertEqual(span_obj["parentId"], self.span.parent_id)
 
-    def test_to_span_obj_sets_default_parent_id(self):
+    def test_to_span_obj_default_no_parent_id(self):
         self.span.parent_id = None
         span_obj = self.test_span_observer._to_span_obj([], [])
-        self.assertEqual(span_obj["parentId"], 0)
+        self.assertFalse("parentId" in span_obj)
 
     def test_incr_tag_adds_binary_annotation(self):
         self.test_span_observer.binary_annotations = []