diff --git a/packages/firebase_analytics/firebase_analytics/android/src/main/java/io/flutter/plugins/firebase/analytics/FlutterFirebaseAnalyticsPlugin.java b/packages/firebase_analytics/firebase_analytics/android/src/main/java/io/flutter/plugins/firebase/analytics/FlutterFirebaseAnalyticsPlugin.java
index e7d20ea9292a..503522f65a6f 100755
--- a/packages/firebase_analytics/firebase_analytics/android/src/main/java/io/flutter/plugins/firebase/analytics/FlutterFirebaseAnalyticsPlugin.java
+++ b/packages/firebase_analytics/firebase_analytics/android/src/main/java/io/flutter/plugins/firebase/analytics/FlutterFirebaseAnalyticsPlugin.java
@@ -53,7 +53,8 @@ private static Bundle createBundleFromMap(Map<String, Object> map) {
       if (value instanceof String) {
         bundle.putString(key, (String) value);
       } else if (value instanceof Integer) {
-        bundle.putInt(key, (Integer) value);
+        // FirebaseAnalytics default event parameters only support long and double types, so we convert the int to a long.
+        bundle.putLong(key, (Integer) value);
       } else if (value instanceof Long) {
         bundle.putLong(key, (Long) value);
       } else if (value instanceof Double) {
diff --git a/packages/firebase_analytics/firebase_analytics/example/lib/main.dart b/packages/firebase_analytics/firebase_analytics/example/lib/main.dart
index 31d823204fc5..0f2f816bf2b5 100755
--- a/packages/firebase_analytics/firebase_analytics/example/lib/main.dart
+++ b/packages/firebase_analytics/firebase_analytics/example/lib/main.dart
@@ -6,6 +6,7 @@ import 'dart:async';
 
 import 'package:firebase_analytics/firebase_analytics.dart';
 import 'package:firebase_core/firebase_core.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 import 'firebase_options.dart';
@@ -68,7 +69,28 @@ class _MyHomePageState extends State<MyHomePage> {
     });
   }
 
+  Future<void> _setDefaultEventParameters() async {
+    if (kIsWeb) {
+      setMessage(
+        '"setDefaultEventParameters()" is not supported on web platform',
+      );
+    } else {
+      // Only strings, numbers & null (longs & doubles for android, ints and doubles for iOS) are supported for default event parameters:
+      await widget.analytics.setDefaultEventParameters(<String, dynamic>{
+        'string': 'string',
+        'int': 42,
+        'long': 12345678910,
+        'double': 42.0,
+        'bool': true.toString(),
+      });
+      setMessage('setDefaultEventParameters succeeded');
+    }
+  }
+
   Future<void> _sendAnalyticsEvent() async {
+    // Only strings and numbers (longs & doubles for android, ints and doubles for iOS) are supported for GA custom event parameters:
+    // https://firebase.google.com/docs/reference/ios/firebaseanalytics/api/reference/Classes/FIRAnalytics#+logeventwithname:parameters:
+    // https://firebase.google.com/docs/reference/android/com/google/firebase/analytics/FirebaseAnalytics#public-void-logevent-string-name,-bundle-params
     await widget.analytics.logEvent(
       name: 'test_event',
       parameters: <String, dynamic>{
@@ -79,9 +101,9 @@ class _MyHomePageState extends State<MyHomePage> {
         // Only strings and numbers (ints & doubles) are supported for GA custom event parameters:
         // https://developers.google.com/analytics/devguides/collection/analyticsjs/custom-dims-mets#overview
         'bool': true.toString(),
-        'items': [itemCreator()]
       },
     );
+
     setMessage('logEvent succeeded');
   }
 
@@ -327,6 +349,10 @@ class _MyHomePageState extends State<MyHomePage> {
             onPressed: _testResetAnalyticsData,
             child: const Text('Test resetAnalyticsData'),
           ),
+          MaterialButton(
+            onPressed: _setDefaultEventParameters,
+            child: const Text('Test setDefaultEventParameters'),
+          ),
           Text(
             _message,
             style: const TextStyle(color: Color.fromARGB(255, 0, 155, 0)),
diff --git a/packages/firebase_analytics/firebase_analytics/lib/src/firebase_analytics.dart b/packages/firebase_analytics/firebase_analytics/lib/src/firebase_analytics.dart
index 621e8cbae759..1c5250297adf 100755
--- a/packages/firebase_analytics/firebase_analytics/lib/src/firebase_analytics.dart
+++ b/packages/firebase_analytics/firebase_analytics/lib/src/firebase_analytics.dart
@@ -81,30 +81,14 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     Map<String, Object?>? parameters,
     AnalyticsCallOptions? callOptions,
   }) async {
-    if (_reservedEventNames.contains(name)) {
-      throw ArgumentError.value(
-        name,
-        'name',
-        'Event name is reserved and cannot be used',
-      );
-    }
-
-    const String kReservedPrefix = 'firebase_';
+    _logEventNameValidation(name);
 
-    if (name.startsWith(kReservedPrefix)) {
-      throw ArgumentError.value(
-        name,
-        'name',
-        'Prefix "$kReservedPrefix" is reserved and cannot be used.',
+    parameters?.forEach((key, value) {
+      assert(
+        value is String || value is num,
+        "'string' OR 'number' must be set as the value of the parameter: $key",
       );
-    }
-
-    if (parameters?['items'] is List<AnalyticsEventItem>) {
-      // ignore: cast_nullable_to_non_nullable
-      parameters!['items'] = (parameters['items'] as List<AnalyticsEventItem>)
-          .map((item) => item.asMap())
-          .toList();
-    }
+    });
 
     await _delegate.logEvent(
       name: name,
@@ -128,6 +112,12 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   Future<void> setDefaultEventParameters(
     Map<String, Object?>? defaultParameters,
   ) async {
+    defaultParameters?.forEach((key, value) {
+      assert(
+        value is String || value is num || value == null,
+        "'string', 'null' or 'number' must be set as the value of the parameter: $key",
+      );
+    });
     await _delegate.setDefaultEventParameters(defaultParameters);
   }
 
@@ -243,15 +233,15 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     List<AnalyticsEventItem>? items,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'add_payment_info',
-      parameters: {
+      parameters: filterOutNulls({
         _COUPON: coupon,
         _CURRENCY: currency,
         _PAYMENT_TYPE: paymentType,
         _VALUE: value,
-        _ITEMS: items,
-      },
+        _ITEMS: _marshalItems(items),
+      }),
       callOptions: callOptions,
     );
   }
@@ -270,15 +260,15 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     List<AnalyticsEventItem>? items,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'add_shipping_info',
-      parameters: {
+      parameters: filterOutNulls({
         _COUPON: coupon,
         _CURRENCY: currency,
         _SHIPPING_TIER: shippingTier,
         _VALUE: value,
-        _ITEMS: items,
-      },
+        _ITEMS: _marshalItems(items),
+      }),
       callOptions: callOptions,
     );
   }
@@ -298,10 +288,10 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'add_to_cart',
       parameters: filterOutNulls(<String, Object?>{
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
         _VALUE: value,
         _CURRENCY: currency,
       }),
@@ -325,10 +315,10 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'add_to_wishlist',
       parameters: filterOutNulls(<String, Object?>{
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
         _VALUE: value,
         _CURRENCY: currency,
       }),
@@ -367,7 +357,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'ecommerce_purchase',
       parameters: filterOutNulls(<String, Object?>{
         _CURRENCY: currency,
@@ -407,7 +397,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'ad_impression',
       parameters: filterOutNulls(<String, Object?>{
         _AD_PLATFORM: adPlatform,
@@ -425,7 +415,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   ///
   /// See: https://firebase.google.com/docs/reference/android/com/google/firebase/analytics/FirebaseAnalytics.Event.html#APP_OPEN
   Future<void> logAppOpen({AnalyticsCallOptions? callOptions}) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'app_open',
       callOptions: callOptions,
     );
@@ -447,12 +437,12 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'begin_checkout',
       parameters: filterOutNulls(<String, Object?>{
         _VALUE: value,
         _CURRENCY: currency,
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
         _COUPON: coupon,
       }),
       callOptions: callOptions,
@@ -474,7 +464,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? cp1,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'campaign_details',
       parameters: filterOutNulls(<String, String?>{
         _SOURCE: source,
@@ -501,7 +491,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     required num value,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'earn_virtual_currency',
       parameters: filterOutNulls(<String, Object?>{
         _VIRTUAL_CURRENCY_NAME: virtualCurrencyName,
@@ -535,7 +525,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'present_offer',
       parameters: filterOutNulls(<String, Object?>{
         _ITEM_ID: itemId,
@@ -565,7 +555,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'purchase_refund',
       parameters: filterOutNulls(<String, Object?>{
         _CURRENCY: currency,
@@ -590,7 +580,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'generate_lead',
       parameters: filterOutNulls(<String, Object?>{
         _CURRENCY: currency,
@@ -611,7 +601,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     required String groupId,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'join_group',
       parameters: filterOutNulls(<String, Object?>{
         _GROUP_ID: groupId,
@@ -632,7 +622,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? character,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'level_up',
       parameters: filterOutNulls(<String, Object?>{
         _LEVEL: level,
@@ -649,7 +639,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     required String levelName,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'level_start',
       parameters: filterOutNulls(<String, Object?>{
         _LEVEL_NAME: levelName,
@@ -666,7 +656,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     int? success,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'level_end',
       parameters: filterOutNulls(<String, Object?>{
         _LEVEL_NAME: levelName,
@@ -682,7 +672,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     required int checkoutStep,
     required String checkoutOption,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'set_checkout_option',
       parameters: filterOutNulls(<String, Object?>{
         _CHECKOUT_STEP: checkoutStep,
@@ -701,7 +691,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? loginMethod,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'login',
       parameters: filterOutNulls(<String, Object?>{
         _METHOD: loginMethod,
@@ -724,7 +714,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? character,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'post_score',
       parameters: filterOutNulls(<String, Object?>{
         _SCORE: score,
@@ -755,13 +745,13 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'purchase',
       parameters: filterOutNulls(<String, Object?>{
         _CURRENCY: currency,
         _COUPON: coupon,
         _VALUE: value,
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
         _TAX: tax,
         _SHIPPING: shipping,
         _TRANSACTION_ID: transactionId,
@@ -784,12 +774,12 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'remove_from_cart',
       parameters: filterOutNulls(<String, Object?>{
         _CURRENCY: currency,
         _VALUE: value,
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
       }),
       callOptions: callOptions,
     );
@@ -805,7 +795,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? screenName,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'screen_view',
       parameters: filterOutNulls(<String, Object?>{
         _SCREEN_CLASS: screenClass,
@@ -826,12 +816,12 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     List<AnalyticsEventItem>? items,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'select_item',
       parameters: filterOutNulls(<String, Object?>{
         _ITEM_LIST_ID: itemListId,
         _ITEM_LIST_NAME: itemListName,
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
       }),
       callOptions: callOptions,
     );
@@ -851,12 +841,12 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? promotionName,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'select_promotion',
       parameters: filterOutNulls(<String, Object?>{
         _CREATIVE_NAME: creativeName,
         _CREATIVE_SLOT: creativeSlot,
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
         _LOCATION_ID: locationId,
         _PROMOTION_ID: promotionId,
         _PROMOTION_NAME: promotionName,
@@ -876,12 +866,12 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     List<AnalyticsEventItem>? items,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'view_cart',
       parameters: filterOutNulls(<String, Object?>{
         _CURRENCY: currency,
         _VALUE: value,
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
       }),
       callOptions: callOptions,
     );
@@ -906,7 +896,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? travelClass,
     AnalyticsCallOptions? callOptions,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'search',
       parameters: filterOutNulls(
         <String, Object?>{
@@ -937,7 +927,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     required String contentType,
     required String itemId,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'select_content',
       parameters: filterOutNulls(<String, Object?>{
         _CONTENT_TYPE: contentType,
@@ -957,7 +947,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     required String itemId,
     required String method,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'share',
       parameters: filterOutNulls(<String, Object?>{
         _CONTENT_TYPE: contentType,
@@ -978,7 +968,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   Future<void> logSignUp({
     required String signUpMethod,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'sign_up',
       parameters: filterOutNulls(<String, Object?>{
         _METHOD: signUpMethod,
@@ -997,7 +987,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     required String virtualCurrencyName,
     required num value,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'spend_virtual_currency',
       parameters: filterOutNulls(<String, Object?>{
         _ITEM_NAME: itemName,
@@ -1015,7 +1005,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   ///
   /// See: https://firebase.google.com/docs/reference/android/com/google/firebase/analytics/FirebaseAnalytics.Event.html#TUTORIAL_BEGIN
   Future<void> logTutorialBegin() {
-    return logEvent(name: 'tutorial_begin');
+    return _delegate.logEvent(name: 'tutorial_begin');
   }
 
   /// Logs the standard `tutorial_complete` event.
@@ -1026,7 +1016,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   ///
   /// See: https://firebase.google.com/docs/reference/android/com/google/firebase/analytics/FirebaseAnalytics.Event.html#TUTORIAL_COMPLETE
   Future<void> logTutorialComplete() {
-    return logEvent(name: 'tutorial_complete');
+    return _delegate.logEvent(name: 'tutorial_complete');
   }
 
   /// Logs the standard `unlock_achievement` event with a given achievement
@@ -1041,7 +1031,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   Future<void> logUnlockAchievement({
     required String id,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'unlock_achievement',
       parameters: filterOutNulls(<String, Object?>{
         _ACHIEVEMENT_ID: id,
@@ -1066,12 +1056,12 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   }) {
     _requireValueAndCurrencyTogether(value, currency);
 
-    return logEvent(
+    return _delegate.logEvent(
       name: 'view_item',
       parameters: filterOutNulls(<String, Object?>{
         _CURRENCY: currency,
         _VALUE: value,
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
       }),
     );
   }
@@ -1087,10 +1077,10 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? itemListId,
     String? itemListName,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'view_item_list',
       parameters: filterOutNulls(<String, Object?>{
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
         _ITEM_LIST_ID: itemListId,
         _ITEM_LIST_NAME: itemListName,
       }),
@@ -1110,12 +1100,12 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? promotionId,
     String? promotionName,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'view_promotion',
       parameters: filterOutNulls(<String, Object?>{
         _CREATIVE_NAME: creativeName,
         _CREATIVE_SLOT: creativeSlot,
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
         _LOCATION_ID: locationId,
         _PROMOTION_ID: promotionId,
         _PROMOTION_NAME: promotionName,
@@ -1132,7 +1122,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   Future<void> logViewSearchResults({
     required String searchTerm,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'view_search_results',
       parameters: filterOutNulls(<String, Object?>{
         _SEARCH_TERM: searchTerm,
@@ -1155,7 +1145,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
     String? affiliation,
     List<AnalyticsEventItem>? items,
   }) {
-    return logEvent(
+    return _delegate.logEvent(
       name: 'refund',
       parameters: filterOutNulls(<String, Object?>{
         _CURRENCY: currency,
@@ -1165,7 +1155,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
         _SHIPPING: shipping,
         _TRANSACTION_ID: transactionId,
         _AFFILIATION: affiliation,
-        _ITEMS: items,
+        _ITEMS: _marshalItems(items),
       }),
     );
   }
@@ -1218,6 +1208,32 @@ void _requireValueAndCurrencyTogether(double? value, String? currency) {
   }
 }
 
+void _logEventNameValidation(String name) {
+  if (_reservedEventNames.contains(name)) {
+    throw ArgumentError.value(
+      name,
+      'name',
+      'Event name is reserved and cannot be used',
+    );
+  }
+
+  const String kReservedPrefix = 'firebase_';
+
+  if (name.startsWith(kReservedPrefix)) {
+    throw ArgumentError.value(
+      name,
+      'name',
+      'Prefix "$kReservedPrefix" is reserved and cannot be used.',
+    );
+  }
+}
+
+List<Map<String, dynamic>>? _marshalItems(List<AnalyticsEventItem>? items) {
+  if (items == null) return null;
+
+  return items.map((AnalyticsEventItem item) => item.asMap()).toList();
+}
+
 /// Reserved event names that cannot be used.
 ///
 /// See: https://firebase.google.com/docs/reference/android/com/google/firebase/analytics/FirebaseAnalytics.Event.html
diff --git a/tests/integration_test/firebase_analytics/firebase_analytics_e2e_test.dart b/tests/integration_test/firebase_analytics/firebase_analytics_e2e_test.dart
index 0497157fe385..c40f4eb6f889 100644
--- a/tests/integration_test/firebase_analytics/firebase_analytics_e2e_test.dart
+++ b/tests/integration_test/firebase_analytics/firebase_analytics_e2e_test.dart
@@ -62,11 +62,25 @@ void main() {
           parameters: {
             'foo': 'bar',
             'baz': 500,
-            'items': [analyticsEventItem],
           },
         ),
         completes,
       );
+
+      // test custom event assert exception
+      await expectLater(
+        FirebaseAnalytics.instance.logEvent(
+          name: 'testing-parameters',
+          parameters: {
+            'foo': 'bar',
+            'baz': 500,
+            // Lists are not supported
+            'items': [analyticsEventItem],
+          },
+        ),
+        throwsA(isA<AssertionError>()),
+      );
+
       // test 2 reserved events
       await expectLater(
         FirebaseAnalytics.instance.logAdImpression(
@@ -219,6 +233,19 @@ void main() {
             FirebaseAnalytics.instance.setDefaultEventParameters(null),
             completes,
           );
+
+          // test custom event assert exception
+          await expectLater(
+            FirebaseAnalytics.instance.setDefaultEventParameters(
+              {
+                'foo': 'bar',
+                'baz': 500,
+                // Lists are not supported
+                'items': ['some', 'items'],
+              },
+            ),
+            throwsA(isA<AssertionError>()),
+          );
         }
       },
     );