diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/testing/TCServiceMessagesTestExecutor.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/testing/TCServiceMessagesTestExecutor.kt
index b9b87470a4c..3aaa7231a30 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/testing/TCServiceMessagesTestExecutor.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/testing/TCServiceMessagesTestExecutor.kt
@@ -1,3 +1,8 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
 package org.jetbrains.kotlin.gradle.internal.testing
 
 import org.gradle.api.internal.tasks.testing.TestExecuter
@@ -78,7 +83,9 @@ class TCServiceMessagesTestExecutor(
 
     override fun stopNow() {
         shouldStop = true
-        execHandle?.abort()
+        if (::execHandle.isInitialized) {
+            execHandle.abort()
+        }
         outputReaderThread?.join()
     }
 
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 a9d5a6dcfc2..e53e5cb3d23 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
@@ -423,7 +423,6 @@ class KotlinKarma(override val compilation: KotlinJsCompilation) :
                         progressLogger.progress(value)
 
                         parseConsole(value)
-                        super.printNonTestOutput(text)
                     }
 
                     private fun parseConsole(text: String) {
@@ -446,6 +445,8 @@ class KotlinKarma(override val compilation: KotlinJsCompilation) :
                                 INFO, LOG -> log.info(nonColoredMessage)
                                 DEBUG -> log.debug(nonColoredMessage)
                             }
+                        } else {
+                            super.printNonTestOutput(text)
                         }
                     }