diff --git a/package.json b/package.json
index 3632bcbe..fb1d215d 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "bdd"
   ],
   "scripts": {
-    "posttest": "eslint src/**/*.js spec/**/*.js && prettier --check src/**/*.js spec/**/*.js",
+    "posttest": "eslint \"src/**/*.js\" \"spec/**/*.js\" && prettier --check src/**/*.js spec/**/*.js",
     "test": "grunt --stack execSpecsInNode",
     "cleanup": "prettier --write src/**/*.js spec/**/*.js",
     "build": "grunt buildDistribution",
@@ -28,7 +28,7 @@
   "devDependencies": {
     "acorn": "^6.0.0",
     "ejs": "^2.5.5",
-    "eslint": "^5.16.0",
+    "eslint": "7.3.1",
     "express": "^4.16.4",
     "fast-check": "^1.21.0",
     "fast-glob": "^2.2.6",
@@ -67,10 +67,6 @@
         }
       ],
       "block-spacing": "error",
-      "comma-dangle": [
-        "error",
-        "never"
-      ],
       "func-call-spacing": [
         "error",
         "never"
diff --git a/spec/.eslintrc.js b/spec/.eslintrc.js
new file mode 100644
index 00000000..969a4efd
--- /dev/null
+++ b/spec/.eslintrc.js
@@ -0,0 +1,13 @@
+module.exports = {
+  rules: {
+    // Relax rules for now to allow for the quirks of the test suite
+    // TODO: We should probably remove these & fix the resulting errors
+    "quotes": "off",
+    "semi": "off",
+    "key-spacing": "off",
+    "space-before-blocks": "off",
+    "no-unused-vars": "off",
+    "no-trailing-spaces": "off",
+    "block-spacing": "off",
+  }
+}
diff --git a/spec/core/matchers/matchersUtilSpec.js b/spec/core/matchers/matchersUtilSpec.js
index 81874302..10bd0ec0 100644
--- a/spec/core/matchers/matchersUtilSpec.js
+++ b/spec/core/matchers/matchersUtilSpec.js
@@ -821,7 +821,7 @@ describe("matchersUtil", function() {
 
         expect(diffBuilder.setRoots).toHaveBeenCalledWith(actual, expected);
         expect(diffBuilder.withPath).toHaveBeenCalledWith('x', jasmine.any(Function));
-        expect(diffBuilder.recordMismatch). toHaveBeenCalledWith();
+        expect(diffBuilder.recordMismatch).toHaveBeenCalledWith();
       });
 
       it("records both objects when the tester does not implement valuesForDiff", function() {
@@ -836,7 +836,7 @@ describe("matchersUtil", function() {
 
         expect(diffBuilder.setRoots).toHaveBeenCalledWith(actual, expected);
         expect(diffBuilder.withPath).toHaveBeenCalledWith('x', jasmine.any(Function));
-        expect(diffBuilder.recordMismatch). toHaveBeenCalledWith();
+        expect(diffBuilder.recordMismatch).toHaveBeenCalledWith();
       });
     });
 
diff --git a/src/core/matchers/DiffBuilder.js b/src/core/matchers/DiffBuilder.js
index 4e43aeaa..83333d8a 100644
--- a/src/core/matchers/DiffBuilder.js
+++ b/src/core/matchers/DiffBuilder.js
@@ -72,7 +72,7 @@ getJasmineRequireObj().DiffBuilder = function (j$) {
   };
 
   function dereferencePath(objectPath, actual, expected, pp) {
-    var i, asymmetricResult
+    var i, asymmetricResult;
 
     for (i = 0; i < objectPath.components.length; i++) {
       actual = actual[objectPath.components[i]];