diff --git a/eslint-plugin-expensify/prefer-at.js b/eslint-plugin-expensify/prefer-at.js
index 3ecc430..ac7a08a 100644
--- a/eslint-plugin-expensify/prefer-at.js
+++ b/eslint-plugin-expensify/prefer-at.js
@@ -1,3 +1,4 @@
+const {ESLintUtils} = require('@typescript-eslint/utils');
 const message = require('./CONST').MESSAGE.PREFER_AT;
 
 module.exports = {
@@ -5,6 +6,15 @@ module.exports = {
         fixable: 'code',
     },
     create(context) {
+        const parserServices = ESLintUtils.getParserServices(context);
+        const typeChecker = parserServices.program.getTypeChecker();
+
+        function isArrayType(node) {
+            const tsNode = parserServices.esTreeNodeToTSNodeMap.get(node);
+            const type = typeChecker.getTypeAtLocation(tsNode);
+            return typeChecker.isArrayType(type) || typeChecker.isTupleType(type);
+        }
+
         function isLiteralNumber(node) {
             return node && node.type === 'Literal' && typeof node.value === 'number';
         }
@@ -21,6 +31,11 @@ module.exports = {
 
         function checkNode(node) {
             if (node.type === 'MemberExpression' && node.property) {
+                // Check if the object being accessed is an array
+                if (!isArrayType(node.object)) {
+                    return;
+                }
+
                 // Handle items cases like test[0]
                 if (isLiteralNumber(node.property)) {
                     context.report({
diff --git a/eslint-plugin-expensify/tests/file.ts b/eslint-plugin-expensify/tests/file.ts
new file mode 100644
index 0000000..e69de29
diff --git a/eslint-plugin-expensify/tests/prefer-at.test.js b/eslint-plugin-expensify/tests/prefer-at.test.js
index dcddfdc..ef824f3 100644
--- a/eslint-plugin-expensify/tests/prefer-at.test.js
+++ b/eslint-plugin-expensify/tests/prefer-at.test.js
@@ -1,11 +1,14 @@
-const RuleTester = require('eslint').RuleTester;
+const RuleTester = require('@typescript-eslint/rule-tester').RuleTester;
 const rule = require('../prefer-at');
 const message = require('../CONST').MESSAGE.PREFER_AT;
 
 const ruleTester = new RuleTester({
+    parser: '@typescript-eslint/parser',
     parserOptions: {
-        ecmaVersion: 6,
+        project: './tsconfig.json',
+        tsconfigRootDir: __dirname,
         sourceType: 'module',
+        ecmaVersion: 2020,
     },
 });
 
@@ -29,6 +32,15 @@ ruleTester.run('prefer-at', rule, {
         {
             code: 'test.at((test.length - 1) / 2)',
         },
+        {
+            code: `
+                const object = {0: 'v0', 1: 'v1', 2: 'v2'};
+                object[0]
+                `,
+        },
+        {
+            code: '[0, 1, 2].at(1)',
+        },
     ],
     invalid: [
         {
@@ -46,21 +58,25 @@ ruleTester.run('prefer-at', rule, {
             }],
         },
         {
-            code: 'sample[sample.length-1]',
-            output: 'sample.at(-1)',
+            code: 'test[(test.length - 1) / 2]',
+            output: 'test.at((test.length - 1) / 2)',
             errors: [{
                 message,
             }],
-        },{
-            code: 'testing[testing.length-2]',
-            output: 'testing.at(-2)',
+        },
+        {
+            code: `
+                const sample = [];
+                sample[sample.length-1]
+                `,
+            output: 'sample.at(sample.length-1)',
             errors: [{
                 message,
             }],
         },
         {
-            code: 'test[(test.length - 1) / 2]',
-            output: 'test.at((test.length - 1) / 2)',
+            code: '[0, 1, 2][1]',
+            output: '[0, 1, 2].at(1)',
             errors: [{
                 message,
             }],
diff --git a/eslint-plugin-expensify/tests/tsconfig.json b/eslint-plugin-expensify/tests/tsconfig.json
new file mode 100644
index 0000000..63ca604
--- /dev/null
+++ b/eslint-plugin-expensify/tests/tsconfig.json
@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "es5",
+    "sourceMap": true
+  },
+  "exclude": [
+    "node_modules"
+  ]
+}
diff --git a/package-lock.json b/package-lock.json
index 1c79955..f55ba36 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,6 +11,7 @@
       "dependencies": {
         "@lwc/eslint-plugin-lwc": "^1.7.2",
         "@typescript-eslint/parser": "^7.12.0",
+        "@typescript-eslint/rule-tester": "^7.16.1",
         "@typescript-eslint/utils": "^7.12.0",
         "babel-eslint": "^10.1.0",
         "eslint": "^8.56.0",
@@ -1932,6 +1933,107 @@
         }
       }
     },
+    "node_modules/@typescript-eslint/rule-tester": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/rule-tester/-/rule-tester-7.16.1.tgz",
+      "integrity": "sha512-wWosvVCokYpNFtAWxupGH98mO/QGTDUrYUOJ836KVy9thHT3cF4Hy7yHbezeVHP5ByScyGSdlryfTk226tGySw==",
+      "dependencies": {
+        "@typescript-eslint/typescript-estree": "7.16.1",
+        "@typescript-eslint/utils": "7.16.1",
+        "ajv": "^6.12.6",
+        "json-stable-stringify-without-jsonify": "^1.0.1",
+        "lodash.merge": "4.6.2",
+        "semver": "^7.6.0"
+      },
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      },
+      "peerDependencies": {
+        "@eslint/eslintrc": ">=2",
+        "eslint": "^8.56.0"
+      }
+    },
+    "node_modules/@typescript-eslint/rule-tester/node_modules/@typescript-eslint/types": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-7.16.1.tgz",
+      "integrity": "sha512-AQn9XqCzUXd4bAVEsAXM/Izk11Wx2u4H3BAfQVhSfzfDOm/wAON9nP7J5rpkCxts7E5TELmN845xTUCQrD1xIQ==",
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      }
+    },
+    "node_modules/@typescript-eslint/rule-tester/node_modules/@typescript-eslint/typescript-estree": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-7.16.1.tgz",
+      "integrity": "sha512-0vFPk8tMjj6apaAZ1HlwM8w7jbghC8jc1aRNJG5vN8Ym5miyhTQGMqU++kuBFDNKe9NcPeZ6x0zfSzV8xC1UlQ==",
+      "dependencies": {
+        "@typescript-eslint/types": "7.16.1",
+        "@typescript-eslint/visitor-keys": "7.16.1",
+        "debug": "^4.3.4",
+        "globby": "^11.1.0",
+        "is-glob": "^4.0.3",
+        "minimatch": "^9.0.4",
+        "semver": "^7.6.0",
+        "ts-api-utils": "^1.3.0"
+      },
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@typescript-eslint/rule-tester/node_modules/@typescript-eslint/visitor-keys": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-7.16.1.tgz",
+      "integrity": "sha512-Qlzzx4sE4u3FsHTPQAAQFJFNOuqtuY0LFrZHwQ8IHK705XxBiWOFkfKRWu6niB7hwfgnwIpO4jTC75ozW1PHWg==",
+      "dependencies": {
+        "@typescript-eslint/types": "7.16.1",
+        "eslint-visitor-keys": "^3.4.3"
+      },
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      }
+    },
+    "node_modules/@typescript-eslint/rule-tester/node_modules/eslint-visitor-keys": {
+      "version": "3.4.3",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-3.4.3.tgz",
+      "integrity": "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag==",
+      "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/eslint"
+      }
+    },
+    "node_modules/@typescript-eslint/rule-tester/node_modules/semver": {
+      "version": "7.6.2",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.6.2.tgz",
+      "integrity": "sha512-FNAIBWCx9qcRhoHcgcJ0gvU7SN1lYU2ZXuSfl04bSC5OpvDHFyJCjdNHomPXxjQlCBU67YW64PzY7/VIEH7F2w==",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/@typescript-eslint/scope-manager": {
       "version": "7.12.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-7.12.0.tgz",
@@ -1999,14 +2101,14 @@
       }
     },
     "node_modules/@typescript-eslint/utils": {
-      "version": "7.12.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-7.12.0.tgz",
-      "integrity": "sha512-Y6hhwxwDx41HNpjuYswYp6gDbkiZ8Hin9Bf5aJQn1bpTs3afYY4GX+MPYxma8jtoIV2GRwTM/UJm/2uGCVv+DQ==",
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-7.16.1.tgz",
+      "integrity": "sha512-WrFM8nzCowV0he0RlkotGDujx78xudsxnGMBHI88l5J8wEhED6yBwaSLP99ygfrzAjsQvcYQ94quDwI0d7E1fA==",
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.4.0",
-        "@typescript-eslint/scope-manager": "7.12.0",
-        "@typescript-eslint/types": "7.12.0",
-        "@typescript-eslint/typescript-estree": "7.12.0"
+        "@typescript-eslint/scope-manager": "7.16.1",
+        "@typescript-eslint/types": "7.16.1",
+        "@typescript-eslint/typescript-estree": "7.16.1"
       },
       "engines": {
         "node": "^18.18.0 || >=20.0.0"
@@ -2019,6 +2121,99 @@
         "eslint": "^8.56.0"
       }
     },
+    "node_modules/@typescript-eslint/utils/node_modules/@typescript-eslint/scope-manager": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-7.16.1.tgz",
+      "integrity": "sha512-nYpyv6ALte18gbMz323RM+vpFpTjfNdyakbf3nsLvF43uF9KeNC289SUEW3QLZ1xPtyINJ1dIsZOuWuSRIWygw==",
+      "dependencies": {
+        "@typescript-eslint/types": "7.16.1",
+        "@typescript-eslint/visitor-keys": "7.16.1"
+      },
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      }
+    },
+    "node_modules/@typescript-eslint/utils/node_modules/@typescript-eslint/types": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-7.16.1.tgz",
+      "integrity": "sha512-AQn9XqCzUXd4bAVEsAXM/Izk11Wx2u4H3BAfQVhSfzfDOm/wAON9nP7J5rpkCxts7E5TELmN845xTUCQrD1xIQ==",
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      }
+    },
+    "node_modules/@typescript-eslint/utils/node_modules/@typescript-eslint/typescript-estree": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-7.16.1.tgz",
+      "integrity": "sha512-0vFPk8tMjj6apaAZ1HlwM8w7jbghC8jc1aRNJG5vN8Ym5miyhTQGMqU++kuBFDNKe9NcPeZ6x0zfSzV8xC1UlQ==",
+      "dependencies": {
+        "@typescript-eslint/types": "7.16.1",
+        "@typescript-eslint/visitor-keys": "7.16.1",
+        "debug": "^4.3.4",
+        "globby": "^11.1.0",
+        "is-glob": "^4.0.3",
+        "minimatch": "^9.0.4",
+        "semver": "^7.6.0",
+        "ts-api-utils": "^1.3.0"
+      },
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@typescript-eslint/utils/node_modules/@typescript-eslint/visitor-keys": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-7.16.1.tgz",
+      "integrity": "sha512-Qlzzx4sE4u3FsHTPQAAQFJFNOuqtuY0LFrZHwQ8IHK705XxBiWOFkfKRWu6niB7hwfgnwIpO4jTC75ozW1PHWg==",
+      "dependencies": {
+        "@typescript-eslint/types": "7.16.1",
+        "eslint-visitor-keys": "^3.4.3"
+      },
+      "engines": {
+        "node": "^18.18.0 || >=20.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      }
+    },
+    "node_modules/@typescript-eslint/utils/node_modules/eslint-visitor-keys": {
+      "version": "3.4.3",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-3.4.3.tgz",
+      "integrity": "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag==",
+      "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/eslint"
+      }
+    },
+    "node_modules/@typescript-eslint/utils/node_modules/semver": {
+      "version": "7.6.2",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.6.2.tgz",
+      "integrity": "sha512-FNAIBWCx9qcRhoHcgcJ0gvU7SN1lYU2ZXuSfl04bSC5OpvDHFyJCjdNHomPXxjQlCBU67YW64PzY7/VIEH7F2w==",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/@typescript-eslint/visitor-keys": {
       "version": "7.12.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-7.12.0.tgz",
@@ -10197,6 +10392,60 @@
         "debug": "^4.3.4"
       }
     },
+    "@typescript-eslint/rule-tester": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/rule-tester/-/rule-tester-7.16.1.tgz",
+      "integrity": "sha512-wWosvVCokYpNFtAWxupGH98mO/QGTDUrYUOJ836KVy9thHT3cF4Hy7yHbezeVHP5ByScyGSdlryfTk226tGySw==",
+      "requires": {
+        "@typescript-eslint/typescript-estree": "7.16.1",
+        "@typescript-eslint/utils": "7.16.1",
+        "ajv": "^6.12.6",
+        "json-stable-stringify-without-jsonify": "^1.0.1",
+        "lodash.merge": "4.6.2",
+        "semver": "^7.6.0"
+      },
+      "dependencies": {
+        "@typescript-eslint/types": {
+          "version": "7.16.1",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-7.16.1.tgz",
+          "integrity": "sha512-AQn9XqCzUXd4bAVEsAXM/Izk11Wx2u4H3BAfQVhSfzfDOm/wAON9nP7J5rpkCxts7E5TELmN845xTUCQrD1xIQ=="
+        },
+        "@typescript-eslint/typescript-estree": {
+          "version": "7.16.1",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-7.16.1.tgz",
+          "integrity": "sha512-0vFPk8tMjj6apaAZ1HlwM8w7jbghC8jc1aRNJG5vN8Ym5miyhTQGMqU++kuBFDNKe9NcPeZ6x0zfSzV8xC1UlQ==",
+          "requires": {
+            "@typescript-eslint/types": "7.16.1",
+            "@typescript-eslint/visitor-keys": "7.16.1",
+            "debug": "^4.3.4",
+            "globby": "^11.1.0",
+            "is-glob": "^4.0.3",
+            "minimatch": "^9.0.4",
+            "semver": "^7.6.0",
+            "ts-api-utils": "^1.3.0"
+          }
+        },
+        "@typescript-eslint/visitor-keys": {
+          "version": "7.16.1",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-7.16.1.tgz",
+          "integrity": "sha512-Qlzzx4sE4u3FsHTPQAAQFJFNOuqtuY0LFrZHwQ8IHK705XxBiWOFkfKRWu6niB7hwfgnwIpO4jTC75ozW1PHWg==",
+          "requires": {
+            "@typescript-eslint/types": "7.16.1",
+            "eslint-visitor-keys": "^3.4.3"
+          }
+        },
+        "eslint-visitor-keys": {
+          "version": "3.4.3",
+          "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-3.4.3.tgz",
+          "integrity": "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag=="
+        },
+        "semver": {
+          "version": "7.6.2",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.6.2.tgz",
+          "integrity": "sha512-FNAIBWCx9qcRhoHcgcJ0gvU7SN1lYU2ZXuSfl04bSC5OpvDHFyJCjdNHomPXxjQlCBU67YW64PzY7/VIEH7F2w=="
+        }
+      }
+    },
     "@typescript-eslint/scope-manager": {
       "version": "7.12.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-7.12.0.tgz",
@@ -10234,14 +10483,64 @@
       }
     },
     "@typescript-eslint/utils": {
-      "version": "7.12.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-7.12.0.tgz",
-      "integrity": "sha512-Y6hhwxwDx41HNpjuYswYp6gDbkiZ8Hin9Bf5aJQn1bpTs3afYY4GX+MPYxma8jtoIV2GRwTM/UJm/2uGCVv+DQ==",
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-7.16.1.tgz",
+      "integrity": "sha512-WrFM8nzCowV0he0RlkotGDujx78xudsxnGMBHI88l5J8wEhED6yBwaSLP99ygfrzAjsQvcYQ94quDwI0d7E1fA==",
       "requires": {
         "@eslint-community/eslint-utils": "^4.4.0",
-        "@typescript-eslint/scope-manager": "7.12.0",
-        "@typescript-eslint/types": "7.12.0",
-        "@typescript-eslint/typescript-estree": "7.12.0"
+        "@typescript-eslint/scope-manager": "7.16.1",
+        "@typescript-eslint/types": "7.16.1",
+        "@typescript-eslint/typescript-estree": "7.16.1"
+      },
+      "dependencies": {
+        "@typescript-eslint/scope-manager": {
+          "version": "7.16.1",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-7.16.1.tgz",
+          "integrity": "sha512-nYpyv6ALte18gbMz323RM+vpFpTjfNdyakbf3nsLvF43uF9KeNC289SUEW3QLZ1xPtyINJ1dIsZOuWuSRIWygw==",
+          "requires": {
+            "@typescript-eslint/types": "7.16.1",
+            "@typescript-eslint/visitor-keys": "7.16.1"
+          }
+        },
+        "@typescript-eslint/types": {
+          "version": "7.16.1",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-7.16.1.tgz",
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+        },
+        "@typescript-eslint/typescript-estree": {
+          "version": "7.16.1",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-7.16.1.tgz",
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+            "@typescript-eslint/visitor-keys": "7.16.1",
+            "debug": "^4.3.4",
+            "globby": "^11.1.0",
+            "is-glob": "^4.0.3",
+            "minimatch": "^9.0.4",
+            "semver": "^7.6.0",
+            "ts-api-utils": "^1.3.0"
+          }
+        },
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+            "eslint-visitor-keys": "^3.4.3"
+          }
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+        "eslint-visitor-keys": {
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diff --git a/package.json b/package.json
index 1e1a744..e1d520a 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
   "dependencies": {
     "@lwc/eslint-plugin-lwc": "^1.7.2",
     "@typescript-eslint/parser": "^7.12.0",
+    "@typescript-eslint/rule-tester": "^7.16.1",
     "@typescript-eslint/utils": "^7.12.0",
     "babel-eslint": "^10.1.0",
     "eslint": "^8.56.0",