diff --git a/build-logic/src/main/kotlin/-KmpConfigurationExtension.kt b/build-logic/src/main/kotlin/-KmpConfigurationExtension.kt
index bf195ae..0afca9d 100644
--- a/build-logic/src/main/kotlin/-KmpConfigurationExtension.kt
+++ b/build-logic/src/main/kotlin/-KmpConfigurationExtension.kt
@@ -40,17 +40,18 @@ fun KmpConfigurationExtension.configureShared(
             java9ModuleInfoName = java9ModuleName
         }
 
-        js {
-            target {
-                browser()
-                nodejs()
-            }
-        }
+        js()
 
         @OptIn(ExperimentalWasmDsl::class)
         wasmJs {
             target {
-                browser()
+                browser {
+                    testTask {
+                        useMocha {
+                            timeout = "30s"
+                        }
+                    }
+                }
                 nodejs()
             }
         }
diff --git a/library/base16/karma.config.d/timeout-override.js b/library/base16/karma.config.d/timeout-override.js
deleted file mode 100644
index c93b79c..0000000
--- a/library/base16/karma.config.d/timeout-override.js
+++ /dev/null
@@ -1,9 +0,0 @@
-// Override test timeout. Needed for stress tests
-config.set({
-  "client": {
-    "mocha": {
-      "timeout": 30000
-    },
-  },
-  "browserDisconnectTimeout": 30000
-});
diff --git a/library/base32/karma.config.d/timeout-override.js b/library/base32/karma.config.d/timeout-override.js
deleted file mode 100644
index c93b79c..0000000
--- a/library/base32/karma.config.d/timeout-override.js
+++ /dev/null
@@ -1,9 +0,0 @@
-// Override test timeout. Needed for stress tests
-config.set({
-  "client": {
-    "mocha": {
-      "timeout": 30000
-    },
-  },
-  "browserDisconnectTimeout": 30000
-});
diff --git a/library/base64/karma.config.d/timeout-override.js b/library/base64/karma.config.d/timeout-override.js
deleted file mode 100644
index c93b79c..0000000
--- a/library/base64/karma.config.d/timeout-override.js
+++ /dev/null
@@ -1,9 +0,0 @@
-// Override test timeout. Needed for stress tests
-config.set({
-  "client": {
-    "mocha": {
-      "timeout": 30000
-    },
-  },
-  "browserDisconnectTimeout": 30000
-});
diff --git a/library/core/karma.config.d/timeout-override.js b/library/core/karma.config.d/timeout-override.js
deleted file mode 100644
index c93b79c..0000000
--- a/library/core/karma.config.d/timeout-override.js
+++ /dev/null
@@ -1,9 +0,0 @@
-// Override test timeout. Needed for stress tests
-config.set({
-  "client": {
-    "mocha": {
-      "timeout": 30000
-    },
-  },
-  "browserDisconnectTimeout": 30000
-});