diff --git a/lib/src/sdk/trace/exporters/collector_exporter.dart b/lib/src/sdk/trace/exporters/collector_exporter.dart
index f22c0e53..07f12ffd 100644
--- a/lib/src/sdk/trace/exporters/collector_exporter.dart
+++ b/lib/src/sdk/trace/exporters/collector_exporter.dart
@@ -42,19 +42,19 @@ class CollectorExporter implements sdk.SpanExporter {
   }
 
   Future<void> _send(
-      Uri uri,
-      List<sdk.ReadOnlySpan> spans,
-    ) async {
-      try {
-        final body = pb_trace_service.ExportTraceServiceRequest(
-            resourceSpans: _spansToProtobuf(spans));
-        final headers = {'Content-Type': 'application/x-protobuf'}
-          ..addAll(this.headers);
-
-        await client.post(uri, body: body.writeToBuffer(), headers: headers);
-      } catch (e) {
-        _log.warning('Failed to export ${spans.length} spans.', e);
-      }
+    Uri uri,
+    List<sdk.ReadOnlySpan> spans,
+  ) async {
+    try {
+      final body = pb_trace_service.ExportTraceServiceRequest(
+          resourceSpans: _spansToProtobuf(spans));
+      final headers = {'Content-Type': 'application/x-protobuf'}
+        ..addAll(this.headers);
+
+      await client.post(uri, body: body.writeToBuffer(), headers: headers);
+    } catch (e) {
+      _log.warning('Failed to export ${spans.length} spans.', e);
+    }
   }
 
   /// Group and construct the protobuf equivalent of the given list of [api.Span]s.
diff --git a/test/unit/mocks.mocks.dart b/test/unit/mocks.mocks.dart
index e024c73a..a6984dd0 100644
--- a/test/unit/mocks.mocks.dart
+++ b/test/unit/mocks.mocks.dart
@@ -1,7 +1,7 @@
 // Copyright 2021-2022 Workiva.
 // Licensed under the Apache License, Version 2.0. Please see https://github.com/Workiva/opentelemetry-dart/blob/master/LICENSE for more information
 
-// Mocks generated by Mockito 5.4.2 from annotations
+// Mocks generated by Mockito 5.4.4 from annotations
 // in opentelemetry/test/unit/mocks.dart.
 // Do not manually edit this file.
 
@@ -23,6 +23,8 @@ import 'package:opentelemetry/src/sdk/common/attributes.dart' as _i6;
 // ignore_for_file: avoid_redundant_argument_values
 // ignore_for_file: avoid_setters_without_getters
 // ignore_for_file: comment_references
+// ignore_for_file: deprecated_member_use
+// ignore_for_file: deprecated_member_use_from_same_package
 // ignore_for_file: implementation_imports
 // ignore_for_file: invalid_use_of_visible_for_testing_member
 // ignore_for_file: prefer_const_constructors
@@ -512,8 +514,23 @@ class MockHttpClient extends _i1.Mock implements _i3.Client {
           [url],
           {#headers: headers},
         ),
-        returnValue: _i9.Future<String>.value(''),
-        returnValueForMissingStub: _i9.Future<String>.value(''),
+        returnValue: _i9.Future<String>.value(_i8.dummyValue<String>(
+          this,
+          Invocation.method(
+            #read,
+            [url],
+            {#headers: headers},
+          ),
+        )),
+        returnValueForMissingStub:
+            _i9.Future<String>.value(_i8.dummyValue<String>(
+          this,
+          Invocation.method(
+            #read,
+            [url],
+            {#headers: headers},
+          ),
+        )),
       ) as _i9.Future<String>);
 
   @override
@@ -689,8 +706,14 @@ class MockReadOnlySpan extends _i1.Mock implements _i5.ReadOnlySpan {
   @override
   String get name => (super.noSuchMethod(
         Invocation.getter(#name),
-        returnValue: '',
-        returnValueForMissingStub: '',
+        returnValue: _i8.dummyValue<String>(
+          this,
+          Invocation.getter(#name),
+        ),
+        returnValueForMissingStub: _i8.dummyValue<String>(
+          this,
+          Invocation.getter(#name),
+        ),
       ) as String);
 
   @override
diff --git a/test/unit/sdk/exporters/collector_exporter_test.dart b/test/unit/sdk/exporters/collector_exporter_test.dart
index 8df9e99e..3b0f5c01 100644
--- a/test/unit/sdk/exporters/collector_exporter_test.dart
+++ b/test/unit/sdk/exporters/collector_exporter_test.dart
@@ -195,8 +195,8 @@ void main() {
     sub.cancel();
 
     verify(mockClient.post(uri,
-        body: anything, headers: {'Content-Type': 'application/x-protobuf'}))
-        .called(1);
+        body: anything,
+        headers: {'Content-Type': 'application/x-protobuf'})).called(1);
 
     expect(records, hasLength(1));
     expect(records[0].level, equals(Level.WARNING));