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 3d18b73f922..479b855b329 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
@@ -436,8 +436,6 @@ class KotlinKarma(override val compilation: KotlinJsCompilation) : KotlinJsTestF
         const val CHROME_BIN = "CHROME_BIN"
         const val CHROME_CANARY_BIN = "CHROME_CANARY_BIN"
 
-        const val CLIENT_ID_MARKER = "Connected on socket"
-
         val KARMA_PROBLEM = "(?m)^.*\\d{2} \\d{2} \\d{4,} \\d{2}:\\d{2}:\\d{2}.\\d{3}:(ERROR|WARN) \\[.*]: (.*)\$".toRegex()
     }
 }
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