diff --git a/packages/stream_chat_flutter/test/src/theme/message_input_theme_test.dart b/packages/stream_chat_flutter/test/src/theme/message_input_theme_test.dart
new file mode 100644
index 00000000..b1427509
--- /dev/null
+++ b/packages/stream_chat_flutter/test/src/theme/message_input_theme_test.dart
@@ -0,0 +1,93 @@
+import 'package:flutter/material.dart' hide TextTheme;
+import 'package:flutter_test/flutter_test.dart';
+import 'package:stream_chat_flutter/stream_chat_flutter.dart';
+
+void main() {
+  test('MessageInputThemeData copyWith, ==, hashCode basics', () {
+    expect(const MessageInputThemeData(),
+        const MessageInputThemeData().copyWith());
+    expect(const MessageInputThemeData().hashCode,
+        const MessageInputThemeData().copyWith().hashCode);
+  });
+
+  group('MessageInputThemeData lerps correctly', () {
+    test('Lerp completely from light to dark', () {
+      expect(
+          const MessageInputThemeData().lerp(
+              _messageInputThemeControl, _messageInputThemeControlDark, 1),
+          _messageInputThemeControlDark);
+    });
+  });
+}
+
+final _messageInputThemeControl = MessageInputThemeData(
+  borderRadius: BorderRadius.circular(20),
+  sendAnimationDuration: const Duration(milliseconds: 300),
+  actionButtonColor: ColorTheme.light().accentPrimary,
+  actionButtonIdleColor: ColorTheme.light().textLowEmphasis,
+  expandButtonColor: ColorTheme.light().accentPrimary,
+  sendButtonColor: ColorTheme.light().accentPrimary,
+  sendButtonIdleColor: ColorTheme.light().disabled,
+  inputBackgroundColor: ColorTheme.light().barsBg,
+  inputTextStyle: TextTheme.light().body,
+  idleBorderGradient: LinearGradient(
+    colors: [
+      ColorTheme.light().disabled,
+      ColorTheme.light().disabled,
+    ],
+  ),
+  activeBorderGradient: LinearGradient(
+    colors: [
+      ColorTheme.light().disabled,
+      ColorTheme.light().disabled,
+    ],
+  ),
+);
+
+final _messageInputThemeControlMidLerp = MessageInputThemeData(
+  borderRadius: BorderRadius.circular(20),
+  sendAnimationDuration: const Duration(milliseconds: 300),
+  actionButtonColor: ColorTheme.light().accentPrimary,
+  actionButtonIdleColor: ColorTheme.light().textLowEmphasis,
+  expandButtonColor: ColorTheme.light().accentPrimary,
+  sendButtonColor: ColorTheme.light().accentPrimary,
+  sendButtonIdleColor: ColorTheme.light().disabled,
+  inputBackgroundColor: ColorTheme.light().barsBg,
+  inputTextStyle: TextTheme.light().body,
+  idleBorderGradient: LinearGradient(
+    colors: [
+      ColorTheme.light().disabled,
+      ColorTheme.light().disabled,
+    ],
+  ),
+  activeBorderGradient: LinearGradient(
+    colors: [
+      ColorTheme.light().disabled,
+      ColorTheme.light().disabled,
+    ],
+  ),
+);
+
+final _messageInputThemeControlDark = MessageInputThemeData(
+  borderRadius: BorderRadius.circular(20),
+  sendAnimationDuration: const Duration(milliseconds: 300),
+  actionButtonColor: ColorTheme.dark().accentPrimary,
+  actionButtonIdleColor: ColorTheme.dark().textLowEmphasis,
+  expandButtonColor: ColorTheme.dark().accentPrimary,
+  sendButtonColor: ColorTheme.dark().accentPrimary,
+  sendButtonIdleColor: ColorTheme.dark().disabled,
+  inputBackgroundColor: ColorTheme.dark().barsBg,
+  inputTextStyle: TextTheme.dark().body,
+  idleBorderGradient: LinearGradient(
+    colors: [
+      ColorTheme.dark().disabled,
+      ColorTheme.dark().disabled,
+    ],
+  ),
+  activeBorderGradient: LinearGradient(
+    colors: [
+      ColorTheme.dark().disabled,
+      ColorTheme.dark().disabled,
+    ],
+  ),
+);