diff --git a/libraries/tools/kotlin-source-map-loader/build.gradle.kts b/libraries/tools/kotlin-source-map-loader/build.gradle.kts
index bfa70cc7c8f..971f1f51172 100644
--- a/libraries/tools/kotlin-source-map-loader/build.gradle.kts
+++ b/libraries/tools/kotlin-source-map-loader/build.gradle.kts
@@ -29,6 +29,10 @@ tasks {
         outputs.upToDateWhen {
             projectDir.resolve("node_modules").isDirectory
         }
+        // Without it several yarns can works incorrectly
+        (this as YarnTask).apply {
+            args = listOf("--network-concurrency", "1", "--mutex", "network")
+        }
     }
 
     register<YarnTask>("yarnBuild") {
diff --git a/libraries/tools/kotlin-test-js-runner/build.gradle.kts b/libraries/tools/kotlin-test-js-runner/build.gradle.kts
index 8e0e7fd81a3..71218f5ec15 100644
--- a/libraries/tools/kotlin-test-js-runner/build.gradle.kts
+++ b/libraries/tools/kotlin-test-js-runner/build.gradle.kts
@@ -33,6 +33,10 @@ tasks {
         outputs.upToDateWhen {
             projectDir.resolve("node_modules").isDirectory
         }
+        // Without it several yarns can works incorrectly
+        (this as YarnTask).apply {
+            args = listOf("--network-concurrency", "1", "--mutex", "network")
+        }
     }
 
     register<YarnTask>("yarnBuild") {