diff --git a/libraries/tools/kotlin-test-js-runner/karma-debug-framework.js b/libraries/tools/kotlin-test-js-runner/karma-debug-framework.js
index fa1ef977553..771eae5ea90 100644
--- a/libraries/tools/kotlin-test-js-runner/karma-debug-framework.js
+++ b/libraries/tools/kotlin-test-js-runner/karma-debug-framework.js
@@ -18,7 +18,7 @@ function configureTimeouts(injector) {
         webServer.timeout = 0
     }
     const socketServer = injector.get('socketServer');
-    if (socketServer) {
+    if (socketServer && typeof socketServer.set === 'function') {
         // Disable socket.io heartbeat (ping) to avoid browser disconnecting when debugging tests,
         // because no ping requests are sent when test execution is suspended on a breakpoint.
         // Default values are not enough for suspended execution:
diff --git a/libraries/tools/kotlin-test-js-runner/src/DebugConfigurator.js b/libraries/tools/kotlin-test-js-runner/src/DebugConfigurator.js
index f957ecf8a07..b2fd88eef42 100644
--- a/libraries/tools/kotlin-test-js-runner/src/DebugConfigurator.js
+++ b/libraries/tools/kotlin-test-js-runner/src/DebugConfigurator.js
@@ -97,4 +97,5 @@ export function fixMochaTimeout(config) {
 
 export function fixBrowserActivityTimeout(config) {
     config.browserNoActivityTimeout = null
+    config.pingTimeout = 24 * 60 * 60 * 1000
 }
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