diff --git a/src/node-transformers/preparing-transformers/obfuscating-guards/ReservedStringObfuscatingGuard.ts b/src/node-transformers/preparing-transformers/obfuscating-guards/ReservedStringObfuscatingGuard.ts
index 60572bea..445fa98c 100644
--- a/src/node-transformers/preparing-transformers/obfuscating-guards/ReservedStringObfuscatingGuard.ts
+++ b/src/node-transformers/preparing-transformers/obfuscating-guards/ReservedStringObfuscatingGuard.ts
@@ -46,10 +46,6 @@ export class ReservedStringObfuscatingGuard implements IObfuscatingGuard {
      * @returns {boolean}
      */
     private isReservedString (value: string): boolean {
-        if (!this.options.reservedStrings.length) {
-            return false;
-        }
-
         return this.options.reservedStrings
             .some((reservedString: string) => {
                 return new RegExp(reservedString, 'g').exec(value) !== null;
diff --git a/test/functional-tests/node-transformers/preparing-transformers/obfuscating-guards/reserved-string-obfuscating-guard/ReservedStringObfuscatingGuard.spec.ts b/test/functional-tests/node-transformers/preparing-transformers/obfuscating-guards/reserved-string-obfuscating-guard/ReservedStringObfuscatingGuard.spec.ts
index dca3d7ff..206ec658 100644
--- a/test/functional-tests/node-transformers/preparing-transformers/obfuscating-guards/reserved-string-obfuscating-guard/ReservedStringObfuscatingGuard.spec.ts
+++ b/test/functional-tests/node-transformers/preparing-transformers/obfuscating-guards/reserved-string-obfuscating-guard/ReservedStringObfuscatingGuard.spec.ts
@@ -8,7 +8,7 @@ import { readFileAsString } from '../../../../../helpers/readFileAsString';
 
 describe('ReservedStringObfuscatingGuard', () => {
     describe('check', () => {
-        describe('`reservedString` option is enabled', () => {
+        describe('`reservedStrings` option is enabled', () => {
             const obfuscatingGuardRegExp: RegExp = /var test1 *= *'foo' *\+ *'foo'; *var test2 *= *'barbar'; *var test3 *= *'baz' *\+ *'baz';/;
 
             let obfuscatedCode: string;
@@ -32,7 +32,7 @@ describe('ReservedStringObfuscatingGuard', () => {
             });
         });
 
-        describe('`reservedString` option is disabled', () => {
+        describe('`reservedStrings` option is disabled', () => {
             const obfuscatingGuardRegExp: RegExp = /var test1 *= *'foo' *\+ *'foo'; *var test2 *= *'bar' *\+ *'bar'; *var test3 *= *'baz' *\+ *'baz';/;
 
             let obfuscatedCode: string;