diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KarmaConfig.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KarmaConfig.kt
index 38f62cf15b4..919d31f0a7d 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KarmaConfig.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KarmaConfig.kt
@@ -22,12 +22,7 @@ data class KarmaConfig(
 )
 
 data class KarmaClient(
-    val args: MutableList<String> = mutableListOf(),
-    val mocha: KarmaMocha = KarmaMocha()
-)
-
-data class KarmaMocha(
-    var timeout: String = "2s"
+    val args: MutableList<String> = mutableListOf()
 )
 
 class CustomLauncher(var base: String) {
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KotlinKarma.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KotlinKarma.kt
index 5b105517a53..db8d5b4a9df 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KotlinKarma.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KotlinKarma.kt
@@ -256,7 +256,6 @@ class KotlinKarma(override val compilation: KotlinJsCompilation) : KotlinJsTestF
         debug: Boolean
     ): TCServiceMessagesTestExecutionSpec {
         if (debug) {
-            config.client.mocha.timeout = "0"
             config.singleRun = false
         }