diff --git a/.eslintrc b/.eslintrc
index 5af1e125..86ef0c08 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -8,8 +8,13 @@
     "FileReader": true,
     "localStorage": true
   },
-  "extends": ["airbnb", "prettier"],
-  "plugins": ["prettier"],
+  "extends": [
+    "airbnb",
+    "plugin:jest/recommended",
+    "plugin:jest/style",
+    "prettier"
+  ],
+  "plugins": ["jest", "prettier"],
   "rules": {
     "import/no-extraneous-dependencies": ["error", { "devDependencies": true }],
     "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],
diff --git a/__mocks__/__tests__/gatsby-plugin-firebase.test.js b/__mocks__/__tests__/gatsby-plugin-firebase.test.js
index d75dfcdc..9094c01a 100644
--- a/__mocks__/__tests__/gatsby-plugin-firebase.test.js
+++ b/__mocks__/__tests__/gatsby-plugin-firebase.test.js
@@ -1,4 +1,7 @@
-import FirebaseStub, { AuthConstants } from '../gatsby-plugin-firebase';
+import FirebaseStub, {
+  AuthConstants,
+  DatabaseConstants,
+} from '../gatsby-plugin-firebase';
 
 describe('FirebaseStub', () => {
   const { resumesPath } = FirebaseStub.database();
@@ -49,14 +52,14 @@ describe('FirebaseStub', () => {
       const observer = () => {};
       const unsubscribe = FirebaseStub.auth().onAuthStateChanged(observer);
       expect(unsubscribe).toBeTruthy();
-      expect(FirebaseStub.auth().onAuthStateChangedObservers.length).toEqual(1);
+      expect(FirebaseStub.auth().onAuthStateChangedObservers).toHaveLength(1);
       expect(FirebaseStub.auth().onAuthStateChangedObservers[0]).toEqual(
         observer,
       );
 
       unsubscribe();
 
-      expect(FirebaseStub.auth().onAuthStateChangedObservers.length).toEqual(0);
+      expect(FirebaseStub.auth().onAuthStateChangedObservers).toHaveLength(0);
     });
   });
 
@@ -110,30 +113,24 @@ describe('FirebaseStub', () => {
       const resumesDataSnapshot = await resumesRef.once('value');
       const resumes = resumesDataSnapshot.val();
       expect(resumes).toBeTruthy();
-      expect(Object.keys(resumes).length).toEqual(3);
-      const demoStateResume1 =
-        resumes[FirebaseStub.database().demoStateResume1Id];
+      expect(Object.keys(resumes)).toHaveLength(3);
+      const demoStateResume1 = resumes[DatabaseConstants.demoStateResume1Id];
       expect(demoStateResume1).toBeTruthy();
-      expect(demoStateResume1.id).toEqual(
-        FirebaseStub.database().demoStateResume1Id,
-      );
+      expect(demoStateResume1.id).toEqual(DatabaseConstants.demoStateResume1Id);
       expect(demoStateResume1.user).toEqual(
         FirebaseStub.database().anonymousUser1.uid,
       );
-      const demoStateResume2 =
-        resumes[FirebaseStub.database().demoStateResume2Id];
+      const demoStateResume2 = resumes[DatabaseConstants.demoStateResume2Id];
       expect(demoStateResume2).toBeTruthy();
-      expect(demoStateResume2.id).toEqual(
-        FirebaseStub.database().demoStateResume2Id,
-      );
+      expect(demoStateResume2.id).toEqual(DatabaseConstants.demoStateResume2Id);
       expect(demoStateResume2.user).toEqual(
         FirebaseStub.database().anonymousUser2.uid,
       );
       const initialStateResume =
-        resumes[FirebaseStub.database().initialStateResumeId];
+        resumes[DatabaseConstants.initialStateResumeId];
       expect(initialStateResume).toBeTruthy();
       expect(initialStateResume.id).toEqual(
-        FirebaseStub.database().initialStateResumeId,
+        DatabaseConstants.initialStateResumeId,
       );
       expect(initialStateResume.user).toEqual(
         FirebaseStub.database().anonymousUser1.uid,
@@ -143,7 +140,7 @@ describe('FirebaseStub', () => {
       const usersDataSnapshot = await usersRef.once('value');
       const users = usersDataSnapshot.val();
       expect(users).toBeTruthy();
-      expect(Object.keys(users).length).toEqual(2);
+      expect(Object.keys(users)).toHaveLength(2);
       const anonymousUser1 = users[FirebaseStub.database().anonymousUser1.uid];
       expect(anonymousUser1).toBeTruthy();
       expect(anonymousUser1).toEqual(FirebaseStub.database().anonymousUser1);
@@ -157,12 +154,12 @@ describe('FirebaseStub', () => {
 
       const resume = (
         await FirebaseStub.database()
-          .ref(`${resumesPath}/${FirebaseStub.database().demoStateResume1Id}`)
+          .ref(`${resumesPath}/${DatabaseConstants.demoStateResume1Id}`)
           .once('value')
       ).val();
 
       expect(resume).toBeTruthy();
-      expect(resume.id).toEqual(FirebaseStub.database().demoStateResume1Id);
+      expect(resume.id).toEqual(DatabaseConstants.demoStateResume1Id);
     });
 
     it('retrieves null if resume does not exist', async () => {
@@ -243,7 +240,7 @@ describe('FirebaseStub', () => {
           snapshotValue = snapshot.val();
         });
 
-      expect(Object.keys(snapshotValue).length).toEqual(2);
+      expect(Object.keys(snapshotValue)).toHaveLength(2);
       Object.values(snapshotValue).forEach((resume) =>
         expect(resume.user).toEqual(FirebaseStub.database().anonymousUser1.uid),
       );
diff --git a/__mocks__/gatsby-plugin-firebase.js b/__mocks__/gatsby-plugin-firebase.js
index ed51b926..8494e485 100644
--- a/__mocks__/gatsby-plugin-firebase.js
+++ b/__mocks__/gatsby-plugin-firebase.js
@@ -2,7 +2,10 @@ import path from 'path';
 import fs from 'fs';
 import { v4 as uuidv4 } from 'uuid';
 
-import { AuthConstants } from './gatsby-plugin-firebase/constants';
+import {
+  AuthConstants,
+  DatabaseConstants,
+} from './gatsby-plugin-firebase/constants';
 
 class Auth {
   static #instance = undefined;
@@ -57,9 +60,6 @@ class Database {
   #references = {};
   #anonymousUser1 = undefined;
   #anonymousUser2 = undefined;
-  #demoStateResume1Id = 'demo_1';
-  #demoStateResume2Id = 'demo_2';
-  #initialStateResumeId = 'initst';
 
   constructor() {
     if (Database.#instance) {
@@ -99,18 +99,6 @@ class Database {
     return this.#anonymousUser2;
   }
 
-  get demoStateResume1Id() {
-    return this.#demoStateResume1Id;
-  }
-
-  get demoStateResume2Id() {
-    return this.#demoStateResume2Id;
-  }
-
-  get initialStateResumeId() {
-    return this.#initialStateResumeId;
-  }
-
   get uuid() {
     return this.#uuid;
   }
@@ -131,11 +119,11 @@ class Database {
     date.setMonth(date.getMonth() - 2);
     demoStateResume1.createdAt = date.valueOf();
     demoStateResume1.user = this.anonymousUser1.uid;
-    resumes[this.demoStateResume1Id] = demoStateResume1;
+    resumes[DatabaseConstants.demoStateResume1Id] = demoStateResume1;
 
     const demoStateResume2 = JSON.parse(JSON.stringify(demoStateResume1));
     demoStateResume2.user = this.anonymousUser2.uid;
-    resumes[this.demoStateResume2Id] = demoStateResume2;
+    resumes[DatabaseConstants.demoStateResume2Id] = demoStateResume2;
 
     const initialStateResume = Database.readFile(
       '../src/data/initialState.json',
@@ -143,7 +131,7 @@ class Database {
     initialStateResume.updatedAt = date.valueOf();
     initialStateResume.createdAt = date.valueOf();
     initialStateResume.user = this.anonymousUser1.uid;
-    resumes[this.initialStateResumeId] = initialStateResume;
+    resumes[DatabaseConstants.initialStateResumeId] = initialStateResume;
 
     for (var key in resumes) {
       const resume = resumes[key];
@@ -372,4 +360,4 @@ Object.defineProperty(FirebaseStub.database.ServerValue, 'TIMESTAMP', {
 });
 
 export default FirebaseStub;
-export { AuthConstants };
+export { AuthConstants, DatabaseConstants };
diff --git a/__mocks__/gatsby-plugin-firebase/constants.js b/__mocks__/gatsby-plugin-firebase/constants.js
index 0fef2af1..53e34eaa 100644
--- a/__mocks__/gatsby-plugin-firebase/constants.js
+++ b/__mocks__/gatsby-plugin-firebase/constants.js
@@ -1 +1,4 @@
-export { Auth as AuthConstants } from './constants/auth';
+import AuthConstants from './constants/auth';
+import DatabaseConstants from './constants/database';
+
+export { AuthConstants, DatabaseConstants };
diff --git a/__mocks__/gatsby-plugin-firebase/constants/auth.js b/__mocks__/gatsby-plugin-firebase/constants/auth.js
index 33ea4970..9280bfd9 100644
--- a/__mocks__/gatsby-plugin-firebase/constants/auth.js
+++ b/__mocks__/gatsby-plugin-firebase/constants/auth.js
@@ -1,19 +1,27 @@
-class Auth {
-  static anonymousUser1 = {
-    displayName: 'Anonymous User 1',
-    email: 'anonymous1@noemail.com',
-    isAnonymous: true,
-    name: 'Anonymous 1',
-    uid: 'anonym123',
-  };
+const anonymousUser1 = {
+  displayName: 'Anonymous User 1',
+  email: 'anonymous1@noemail.com',
+  isAnonymous: true,
+  name: 'Anonymous 1',
+  uid: 'anonym123',
+};
 
-  static anonymousUser2 = {
-    displayName: 'Anonymous User 2',
-    email: 'anonymous2@noemail.com',
-    isAnonymous: true,
-    name: 'Anonymous 2',
-    uid: 'anonym456',
-  };
+const anonymousUser2 = {
+  displayName: 'Anonymous User 2',
+  email: 'anonymous2@noemail.com',
+  isAnonymous: true,
+  name: 'Anonymous 2',
+  uid: 'anonym456',
+};
+
+class Auth {
+  static get anonymousUser1() {
+    return anonymousUser1;
+  }
+
+  static get anonymousUser2() {
+    return anonymousUser2;
+  }
 }
 
-export { Auth };
+export default Auth;
diff --git a/__mocks__/gatsby-plugin-firebase/constants/database.js b/__mocks__/gatsby-plugin-firebase/constants/database.js
new file mode 100644
index 00000000..edcb65ec
--- /dev/null
+++ b/__mocks__/gatsby-plugin-firebase/constants/database.js
@@ -0,0 +1,19 @@
+const demoStateResume1Id = 'demo_1';
+const demoStateResume2Id = 'demo_2';
+const initialStateResumeId = 'initst';
+
+class Database {
+  static get demoStateResume1Id() {
+    return demoStateResume1Id;
+  }
+
+  static get demoStateResume2Id() {
+    return demoStateResume2Id;
+  }
+
+  static get initialStateResumeId() {
+    return initialStateResumeId;
+  }
+}
+
+export default Database;
diff --git a/package-lock.json b/package-lock.json
index 501ed4b9..7628193d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4291,6 +4291,22 @@
         "eslint-visitor-keys": "^1.1.0"
       }
     },
+    "@typescript-eslint/scope-manager": {
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-4.12.0.tgz",
+      "integrity": "sha512-QVf9oCSVLte/8jvOsxmgBdOaoe2J0wtEmBr13Yz0rkBNkl5D8bfnf6G4Vhox9qqMIoG7QQoVwd2eG9DM/ge4Qg==",
+      "dev": true,
+      "requires": {
+        "@typescript-eslint/types": "4.12.0",
+        "@typescript-eslint/visitor-keys": "4.12.0"
+      }
+    },
+    "@typescript-eslint/types": {
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-4.12.0.tgz",
+      "integrity": "sha512-N2RhGeheVLGtyy+CxRmxdsniB7sMSCfsnbh8K/+RUIXYYq3Ub5+sukRCjVE80QerrUBvuEvs4fDhz5AW/pcL6g==",
+      "dev": true
+    },
     "@typescript-eslint/typescript-estree": {
       "version": "2.34.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-2.34.0.tgz",
@@ -4315,6 +4331,24 @@
         }
       }
     },
+    "@typescript-eslint/visitor-keys": {
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-4.12.0.tgz",
+      "integrity": "sha512-hVpsLARbDh4B9TKYz5cLbcdMIOAoBYgFPCSP9FFS/liSF+b33gVNq8JHY3QGhHNVz85hObvL7BEYLlgx553WCw==",
+      "dev": true,
+      "requires": {
+        "@typescript-eslint/types": "4.12.0",
+        "eslint-visitor-keys": "^2.0.0"
+      },
+      "dependencies": {
+        "eslint-visitor-keys": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-2.0.0.tgz",
+          "integrity": "sha512-QudtT6av5WXels9WjIM7qz1XD1cWGvX4gGXvp/zBn9nXG02D0utdU3Em2m/QjTnrsk6bBjmCygl3rmj118msQQ==",
+          "dev": true
+        }
+      }
+    },
     "@webassemblyjs/ast": {
       "version": "1.9.0",
       "resolved": "https://registry.npmjs.org/@webassemblyjs/ast/-/ast-1.9.0.tgz",
@@ -10110,6 +10144,70 @@
         }
       }
     },
+    "eslint-plugin-jest": {
+      "version": "24.1.3",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-jest/-/eslint-plugin-jest-24.1.3.tgz",
+      "integrity": "sha512-dNGGjzuEzCE3d5EPZQ/QGtmlMotqnYWD/QpCZ1UuZlrMAdhG5rldh0N0haCvhGnUkSeuORS5VNROwF9Hrgn3Lg==",
+      "dev": true,
+      "requires": {
+        "@typescript-eslint/experimental-utils": "^4.0.1"
+      },
+      "dependencies": {
+        "@typescript-eslint/experimental-utils": {
+          "version": "4.12.0",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/experimental-utils/-/experimental-utils-4.12.0.tgz",
+          "integrity": "sha512-MpXZXUAvHt99c9ScXijx7i061o5HEjXltO+sbYfZAAHxv3XankQkPaNi5myy0Yh0Tyea3Hdq1pi7Vsh0GJb0fA==",
+          "dev": true,
+          "requires": {
+            "@types/json-schema": "^7.0.3",
+            "@typescript-eslint/scope-manager": "4.12.0",
+            "@typescript-eslint/types": "4.12.0",
+            "@typescript-eslint/typescript-estree": "4.12.0",
+            "eslint-scope": "^5.0.0",
+            "eslint-utils": "^2.0.0"
+          }
+        },
+        "@typescript-eslint/typescript-estree": {
+          "version": "4.12.0",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-4.12.0.tgz",
+          "integrity": "sha512-gZkFcmmp/CnzqD2RKMich2/FjBTsYopjiwJCroxqHZIY11IIoN0l5lKqcgoAPKHt33H2mAkSfvzj8i44Jm7F4w==",
+          "dev": true,
+          "requires": {
+            "@typescript-eslint/types": "4.12.0",
+            "@typescript-eslint/visitor-keys": "4.12.0",
+            "debug": "^4.1.1",
+            "globby": "^11.0.1",
+            "is-glob": "^4.0.1",
+            "lodash": "^4.17.15",
+            "semver": "^7.3.2",
+            "tsutils": "^3.17.1"
+          }
+        },
+        "globby": {
+          "version": "11.0.2",
+          "resolved": "https://registry.npmjs.org/globby/-/globby-11.0.2.tgz",
+          "integrity": "sha512-2ZThXDvvV8fYFRVIxnrMQBipZQDr7MxKAmQK1vujaj9/7eF0efG7BPUKJ7jP7G5SLF37xKDXvO4S/KKLj/Z0og==",
+          "dev": true,
+          "requires": {
+            "array-union": "^2.1.0",
+            "dir-glob": "^3.0.1",
+            "fast-glob": "^3.1.1",
+            "ignore": "^5.1.4",
+            "merge2": "^1.3.0",
+            "slash": "^3.0.0"
+          }
+        },
+        "semver": {
+          "version": "7.3.4",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.4.tgz",
+          "integrity": "sha512-tCfb2WLjqFAtXn4KEdxIhalnRtoKFN7nAwj0B3ZXCbQloV2tq5eDbcTmT68JJD3nRJq24/XgxtQKFIpQdtvmVw==",
+          "dev": true,
+          "requires": {
+            "lru-cache": "^6.0.0"
+          }
+        }
+      }
+    },
     "eslint-plugin-jsx-a11y": {
       "version": "6.4.1",
       "resolved": "https://registry.npmjs.org/eslint-plugin-jsx-a11y/-/eslint-plugin-jsx-a11y-6.4.1.tgz",
diff --git a/package.json b/package.json
index b72efbf1..47e10ac1 100644
--- a/package.json
+++ b/package.json
@@ -70,6 +70,7 @@
     "eslint-config-airbnb": "^18.2.1",
     "eslint-config-prettier": "^7.1.0",
     "eslint-loader": "^4.0.2",
+    "eslint-plugin-jest": "^24.1.3",
     "eslint-plugin-jsx-a11y": "^6.4.1",
     "eslint-plugin-prettier": "^3.3.0",
     "eslint-plugin-react": "^7.22.0",
diff --git a/src/pages/app/__tests__/builder.test.js b/src/pages/app/__tests__/builder.test.js
index 3ce73d51..45f0f619 100644
--- a/src/pages/app/__tests__/builder.test.js
+++ b/src/pages/app/__tests__/builder.test.js
@@ -7,7 +7,7 @@ import {
   waitFor,
 } from '@testing-library/react';
 
-import FirebaseStub from 'gatsby-plugin-firebase';
+import FirebaseStub, { DatabaseConstants } from 'gatsby-plugin-firebase';
 
 import { SettingsProvider } from '../../../contexts/SettingsContext';
 import { ModalProvider } from '../../../contexts/ModalContext';
@@ -25,14 +25,13 @@ beforeEach(() => {
 });
 
 describe('Builder', () => {
-  const resumesPath = FirebaseStub.database().resumesPath;
+  const { resumesPath } = FirebaseStub.database();
   let resumeId = null;
   let resume = null;
   let mockUpdateFunction = null;
-  let container = null;
 
   beforeEach(async () => {
-    resumeId = FirebaseStub.database().demoStateResume1Id;
+    resumeId = DatabaseConstants.demoStateResume1Id;
     resume = (
       await FirebaseStub.database()
         .ref(`${resumesPath}/${resumeId}`)
@@ -43,7 +42,7 @@ describe('Builder', () => {
       'update',
     );
 
-    container = render(
+    render(
       <SettingsProvider>
         <ModalProvider>
           <UserProvider>
diff --git a/src/pages/app/__tests__/dashboard.test.js b/src/pages/app/__tests__/dashboard.test.js
index 43018617..fe4c5490 100644
--- a/src/pages/app/__tests__/dashboard.test.js
+++ b/src/pages/app/__tests__/dashboard.test.js
@@ -17,10 +17,9 @@ beforeEach(() => {
 });
 
 describe('Dashboard', () => {
-  const resumesPath = FirebaseStub.database().resumesPath;
+  const { resumesPath } = FirebaseStub.database();
   let resumes = null;
-  let user = FirebaseStub.database().anonymousUser1;
-  let container = null;
+  const user = FirebaseStub.database().anonymousUser1;
 
   beforeEach(async () => {
     resumes = (
@@ -30,10 +29,8 @@ describe('Dashboard', () => {
         .equalTo(user.uid)
         .once('value')
     ).val();
-    expect(resumes).toBeTruthy();
-    expect(Object.keys(resumes).length).not.toEqual(0);
 
-    container = render(
+    render(
       <SettingsProvider>
         <ModalProvider>
           <UserProvider>
@@ -60,7 +57,7 @@ describe('Dashboard', () => {
     });
 
     it('preview of user resumes', async () => {
-      expect(Object.keys(resumes).length).toEqual(2);
+      expect(Object.keys(resumes)).toHaveLength(2);
 
       expect(Object.values(resumes)[0].user).toEqual(user.uid);
       expect(
diff --git a/src/templates/__tests__/Castform.test.js b/src/templates/__tests__/Castform.test.js
index 57d76764..53327b44 100644
--- a/src/templates/__tests__/Castform.test.js
+++ b/src/templates/__tests__/Castform.test.js
@@ -1,6 +1,6 @@
 import React from 'react';
 import { render } from '@testing-library/react';
-import FirebaseStub from 'gatsby-plugin-firebase';
+import FirebaseStub, { DatabaseConstants } from 'gatsby-plugin-firebase';
 
 import '../../i18n/index';
 import Castform from '../Castform';
@@ -10,8 +10,8 @@ describe('Castform', () => {
 
   beforeEach(async () => {
     FirebaseStub.database().initializeData();
-    const resumesPath = FirebaseStub.database().resumesPath;
-    const resumeId = FirebaseStub.database().initialStateResumeId;
+    const { resumesPath } = FirebaseStub.database();
+    const resumeId = DatabaseConstants.initialStateResumeId;
     resume = (
       await FirebaseStub.database()
         .ref(`${resumesPath}/${resumeId}`)
@@ -32,7 +32,7 @@ describe('Castform', () => {
     it('is not shown if not provided', () => {
       const { queryByText } = render(<Castform data={resume} />);
 
-      expect(queryByText(birthDateLabelMatcher)).toBe(null);
+      expect(queryByText(birthDateLabelMatcher)).toBeNull();
     });
 
     it('is shown if provided', () => {