diff --git a/spec/parser/Lexer.spec.js b/spec/parser/Lexer.spec.js
index c080464..8504662 100644
--- a/spec/parser/Lexer.spec.js
+++ b/spec/parser/Lexer.spec.js
@@ -3,7 +3,7 @@ import { FEELLexer, ThrowErrorAndFailListener } from "jdmn-js-runtime";
 
 describe("Lexer", () => {
     it("testIncorrectToken", () => {
-        expect(function() { checkToken("@"); } ).toThrow(new Error("line 1:0 token recognition error at: '@' LexerNoViableAltException"));
+        expect(function() { checkToken("@"); } ).toThrow(new Error("line 1:0 token recognition error at: '@'"));
     });
 
     it("testSpaces", () => {
diff --git a/src/jdmn-js-runtime/index.node.js b/src/jdmn-js-runtime/index.node.js
index ba7a002..5ffd313 100644
--- a/src/jdmn-js-runtime/index.node.js
+++ b/src/jdmn-js-runtime/index.node.js
@@ -1,8 +1,7 @@
 import FEELLexer from "./parser/FEELLexer.js";
 import FEELParser from "./parser/FEELParser.js";
 
-import { inputEntry } from "./validation/FEELValidation.js";
-import { outputEntry } from "./validation/FEELValidation.js";
+import { inputEntry, outputEntry } from "./validation/FEELValidation.js";
 import { ThrowErrorAndFailListener } from "./validation/ThrowErrorAndFailListener.js";
 
 export default {
diff --git a/src/jdmn-js-runtime/index.web.js b/src/jdmn-js-runtime/index.web.js
index 1435901..5ffd313 100644
--- a/src/jdmn-js-runtime/index.web.js
+++ b/src/jdmn-js-runtime/index.web.js
@@ -1,8 +1,7 @@
-import FEELLexer from "./parser/FEELParser.js";
+import FEELLexer from "./parser/FEELLexer.js";
 import FEELParser from "./parser/FEELParser.js";
 
-import { inputEntry } from "./validation/FEELValidation.js";
-import { outputEntry } from "./validation/FEELValidation.js";
+import { inputEntry, outputEntry } from "./validation/FEELValidation.js";
 import { ThrowErrorAndFailListener } from "./validation/ThrowErrorAndFailListener.js";
 
 export default {
diff --git a/src/jdmn-js-runtime/validation/ThrowErrorAndFailListener.js b/src/jdmn-js-runtime/validation/ThrowErrorAndFailListener.js
index cd8a05b..686b991 100644
--- a/src/jdmn-js-runtime/validation/ThrowErrorAndFailListener.js
+++ b/src/jdmn-js-runtime/validation/ThrowErrorAndFailListener.js
@@ -1,8 +1,9 @@
 import antlr4 from "antlr4";
 
 export class ThrowErrorAndFailListener extends antlr4.error.ErrorListener {
-    syntaxError(recognizer, offendingSymbol, line, column, msg, e) {
-        throw new Error(`line ${line}:${column} ${msg} ${e}`);
+    // eslint-disable-next-line no-unused-vars
+    syntaxError(recognizer, offendingSymbol, line, column, msg, _) {
+        throw new Error(`line ${line}:${column} ${msg}`);
     }
 }