diff --git a/TelegramBotAPI-core/build.gradle b/TelegramBotAPI-core/build.gradle
index eaf93b61f8..c40921b5ce 100644
--- a/TelegramBotAPI-core/build.gradle
+++ b/TelegramBotAPI-core/build.gradle
@@ -32,7 +32,14 @@ repositories {
 kotlin {
     jvm()
     js(BOTH) {
-        browser()
+        browser {
+            testTask {
+                useKarma {
+                    useFirefox()
+                    useChrome()
+                }
+            }
+        }
         nodejs()
     }
 
diff --git a/TelegramBotAPI-extensions-api/build.gradle b/TelegramBotAPI-extensions-api/build.gradle
index c6b432b627..042fd744d6 100644
--- a/TelegramBotAPI-extensions-api/build.gradle
+++ b/TelegramBotAPI-extensions-api/build.gradle
@@ -32,7 +32,14 @@ repositories {
 kotlin {
     jvm()
     js(BOTH) {
-        browser()
+        browser {
+            testTask {
+                useKarma {
+                    useFirefox()
+                    useChrome()
+                }
+            }
+        }
         nodejs()
     }
 
diff --git a/TelegramBotAPI-extensions-utils/build.gradle b/TelegramBotAPI-extensions-utils/build.gradle
index c6b432b627..042fd744d6 100644
--- a/TelegramBotAPI-extensions-utils/build.gradle
+++ b/TelegramBotAPI-extensions-utils/build.gradle
@@ -32,7 +32,14 @@ repositories {
 kotlin {
     jvm()
     js(BOTH) {
-        browser()
+        browser {
+            testTask {
+                useKarma {
+                    useFirefox()
+                    useChrome()
+                }
+            }
+        }
         nodejs()
     }