diff --git a/packages/mermaid/src/diagrams/class/parser/class.spec.js b/packages/mermaid/src/diagrams/class/parser/class.spec.js
index d5f1de276c..d611dfc02d 100644
--- a/packages/mermaid/src/diagrams/class/parser/class.spec.js
+++ b/packages/mermaid/src/diagrams/class/parser/class.spec.js
@@ -8,17 +8,9 @@ describe('class diagram', function () {
   });
 
   describe('prototype properties', function () {
-    function validateProperty(prop) {
+    it.each(['__proto__', 'constructor'])('should work with a %s property', function (prop) {
       expect(() => parser.parse(`classDiagram\nclass ${prop}`)).not.toThrow();
       expect(() => parser.parse(`classDiagram\nnamespace ${prop} {\n\tclass A\n}`)).not.toThrow();
-    }
-
-    it('should work with a __proto__ property', function () {
-      validateProperty('__proto__');
-    });
-
-    it('should work with a constructor property', function () {
-      validateProperty('constructor');
     });
   });
 });
diff --git a/packages/mermaid/src/diagrams/er/parser/erDiagram.spec.js b/packages/mermaid/src/diagrams/er/parser/erDiagram.spec.js
index bb747dcc67..e36454f313 100644
--- a/packages/mermaid/src/diagrams/er/parser/erDiagram.spec.js
+++ b/packages/mermaid/src/diagrams/er/parser/erDiagram.spec.js
@@ -794,20 +794,13 @@ describe('when parsing ER diagram it...', function () {
   });
 
   describe('prototype properties', function () {
-    function validateProperty(prop) {
-      expect(() => erDiagram.parser.parse(`erDiagram\n${prop} ||--|{ ORDER : place`)).not.toThrow();
-    }
-
-    it('should work with a prototype property', function () {
-      validateProperty('prototype');
-    });
-
-    it('should work with a __proto__ property', function () {
-      validateProperty('__proto__');
-    });
-
-    it('should work with a constructor property', function () {
-      validateProperty('constructor');
-    });
+    it.each(['__proto__', 'constructor', 'prototype'])(
+      'should work with a %s property',
+      function (prop) {
+        expect(() =>
+          erDiagram.parser.parse(`erDiagram\n${prop} ||--|{ ORDER : place`)
+        ).not.toThrow();
+      }
+    );
   });
 });
diff --git a/packages/mermaid/src/diagrams/flowchart/flowDb.spec.ts b/packages/mermaid/src/diagrams/flowchart/flowDb.spec.ts
index 464faa1824..5983bf04cd 100644
--- a/packages/mermaid/src/diagrams/flowchart/flowDb.spec.ts
+++ b/packages/mermaid/src/diagrams/flowchart/flowDb.spec.ts
@@ -53,8 +53,8 @@ describe('flow db addClass', () => {
 
     expect(classes.has('a')).toBe(true);
     expect(classes.has('b')).toBe(true);
-    expect(classes.get('a')?.['styles']).toEqual(['stroke-width: 8px']);
-    expect(classes.get('b')?.['styles']).toEqual(['stroke-width: 8px']);
+    expect(classes.get('a')?.styles).toEqual(['stroke-width: 8px']);
+    expect(classes.get('b')?.styles).toEqual(['stroke-width: 8px']);
   });
 
   it('should detect single class', () => {
@@ -62,6 +62,6 @@ describe('flow db addClass', () => {
     const classes = flowDb.getClasses();
 
     expect(classes.has('a')).toBe(true);
-    expect(classes.get('a')?.['styles']).toEqual(['stroke-width: 8px']);
+    expect(classes.get('a')?.styles).toEqual(['stroke-width: 8px']);
   });
 });
diff --git a/packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js b/packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js
index 5fd4ef4cad..97d528df63 100644
--- a/packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js
+++ b/packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js
@@ -348,7 +348,7 @@ Bob-->Alice-in-Wonderland:I am good thanks!`;
 
     await mermaidAPI.parse(str);
     const actors = diagram.db.getActors();
-    expect([...actors.keys()].sort()).toEqual(['Alice-in-Wonderland', 'Bob']);
+    expect([...actors.keys()]).toEqual(['Alice-in-Wonderland', 'Bob']);
     expect(actors.get('Alice-in-Wonderland').description).toBe('Alice-in-Wonderland');
     expect(actors.get('Bob').description).toBe('Bob');
 
@@ -371,7 +371,7 @@ B-->A: I am good thanks!`;
 
     const actors = diagram.db.getActors();
 
-    expect([...actors.keys()].sort()).toEqual(['A', 'B']);
+    expect([...actors.keys()]).toEqual(['A', 'B']);
     expect(actors.get('A').description).toBe('Alice');
     expect(actors.get('B').description).toBe('Bob');