diff --git a/lib/index.node.js b/lib/index.node.js
index 79a2112..ae5bc8e 100644
--- a/lib/index.node.js
+++ b/lib/index.node.js
@@ -827,8 +827,6 @@ let _useWorkers = false // The following is just to check whether we can use wor
 This node version doesn't support worker_threads. You should enable them in order to greatly speedup the generation of big prime numbers.
   · With Node >=11 it is enabled by default (consider upgrading).
   · With Node 10, starting with 10.5.0, you can enable worker_threads at runtime executing node --experimental-worker `)
-    /* istanbul ignore next */
-    _useWorkers = true
   }
 }
 /* eslint-enable no-lone-blocks */
diff --git a/src/js/index.js b/src/js/index.js
index 385b8ed..c662dd5 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -676,8 +676,6 @@ if (!process.browser) { // Node.js
 This node version doesn't support worker_threads. You should enable them in order to greatly speedup the generation of big prime numbers.
   · With Node >=11 it is enabled by default (consider upgrading).
   · With Node 10, starting with 10.5.0, you can enable worker_threads at runtime executing node --experimental-worker `)
-    /* istanbul ignore next */
-    _useWorkers = true
   }
 } else { // Native JS
   if (self.Worker) _useWorkers = true