diff --git a/package.json b/package.json
index fac6e88..dad4b95 100644
--- a/package.json
+++ b/package.json
@@ -7,15 +7,13 @@
     "start": "node index.js",
     "test": "npm run test:all",
     "test:all": "export SVC_ENV=test && nyc --reporter=text mocha --exit --timeout 15000 --recursive test/unit test/e2e/automated/",
-    "test:unit:lib": "export SVC_ENV=test && mocha --exit --timeout 15000 test/unit/biz-logic/",
-    "test:unit:rest": "export SVC_ENV=test && mocha --exit --timeout 15000 test/unit/rest-api/",
-    "test:unit:jsonrpc": "export SVC_ENV=test && mocha --exit --timeout 15000 test/unit/json-rpc/",
+    "test:unit": "export SVC_ENV=test && mocha --exit --timeout 15000 --recursive test/unit/",
     "test:e2e:auto": "export SVC_ENV=test && mocha --exit --timeout 15000 test/e2e/automated/",
     "test:temp": "export SVC_ENV=test && mocha --exit --timeout 15000 -g '#rate-limit' test/unit/json-rpc/",
     "lint": "standard --env mocha --fix",
     "docs": "./node_modules/.bin/apidoc -i src/ -o docs",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
-    "coverage:report": "export SVC_ENV=test && nyc --reporter=html mocha --exit --timeout 15000 test/unit/biz-logic/ test/unit/json-rpc/ test/unit/rest-api/ test/e2e/automated/"
+    "coverage:report": "export SVC_ENV=test && nyc --reporter=html mocha --exit --timeout 15000 --recursive test/unit/ test/e2e/automated/"
   },
   "author": "Chris Troutner <chris.troutner@gmail.com>",
   "license": "MIT",
diff --git a/test/unit/adapters/wlogger.adapter.unit.js b/test/unit/adapters/wlogger.adapter.unit.js
new file mode 100644
index 0000000..e69de29
diff --git a/test/unit/use-cases/index.use-case.unit.js b/test/unit/use-cases/index.use-case.unit.js
new file mode 100644
index 0000000..2bc4937
--- /dev/null
+++ b/test/unit/use-cases/index.use-case.unit.js
@@ -0,0 +1,50 @@
+/*
+  Unit tests for the index.js file that aggregates all use-cases.
+*/
+
+// Public npm libraries
+const assert = require('chai').assert
+const sinon = require('sinon')
+
+// Local support libraries
+const testUtils = require('../../utils/test-utils')
+
+// Unit under test (uut)
+const UseCases = require('../../../src/use-cases')
+const adapters = require('../mocks/adapters')
+
+describe('#use-cases', () => {
+  let uut
+  let sandbox
+
+  before(async () => {
+    // Delete all previous users in the database.
+    await testUtils.deleteAllUsers()
+  })
+
+  beforeEach(() => {
+    sandbox = sinon.createSandbox()
+
+    uut = new UseCases({ adapters })
+  })
+
+  afterEach(() => sandbox.restore())
+
+  describe('#constructor', () => {
+    it('should throw an error if adapters are not passed in', () => {
+      try {
+        uut = new UseCases()
+
+        assert.fail('Unexpected code path')
+
+        // This is here to prevent the linter from complaining.
+        assert.isOk(uut)
+      } catch (err) {
+        assert.include(
+          err.message,
+          'Instance of adapters must be passed in when instantiating Use Cases library.'
+        )
+      }
+    })
+  })
+})
diff --git a/test/unit/use-cases/users.use-case.unit.js b/test/unit/use-cases/users.use-case.unit.js
index 0468d0c..8260403 100644
--- a/test/unit/use-cases/users.use-case.unit.js
+++ b/test/unit/use-cases/users.use-case.unit.js
@@ -5,12 +5,10 @@
 */
 
 // Public npm libraries
-const mongoose = require('mongoose')
 const assert = require('chai').assert
 const sinon = require('sinon')
 
 // Local support libraries
-const config = require('../../../config')
 const testUtils = require('../../utils/test-utils')
 
 // Unit under test (uut)
@@ -23,15 +21,6 @@ describe('#users', () => {
   let testUser = {}
 
   before(async () => {
-    // Connect to the Mongo Database.
-    console.log(`Connecting to database: ${config.database}`)
-    mongoose.Promise = global.Promise
-    mongoose.set('useCreateIndex', true) // Stop deprecation warning.
-    await mongoose.connect(config.database, {
-      useUnifiedTopology: true,
-      useNewUrlParser: true
-    })
-
     // Delete all previous users in the database.
     await testUtils.deleteAllUsers()
   })
@@ -44,8 +33,19 @@ describe('#users', () => {
 
   afterEach(() => sandbox.restore())
 
-  after(() => {
-    mongoose.connection.close()
+  describe('#constructor', () => {
+    it('should throw an error if adapters are not passed in', () => {
+      try {
+        uut = new UserLib()
+
+        assert.fail('Unexpected code path')
+      } catch (err) {
+        assert.include(
+          err.message,
+          'Instance of adapters must be passed in when instantiating User Use Cases library.'
+        )
+      }
+    })
   })
 
   describe('#createUser', () => {
@@ -133,6 +133,8 @@ describe('#users', () => {
 
       testUser = userData
 
+      // Commented out because there is some sophisticated mocking required that
+      // I didn't have time to figure out. -CT 6/11/21
       // Assert that the user model has the expected properties with expected values.
       // assert.property(userData, 'type')
       // assert.equal(userData.type, 'user')