diff --git a/.gitignore b/.gitignore
index 3c3629e6..e80e0df2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 node_modules
+/.nyc_output/
+/coverage/
diff --git a/lib/airtable_error.js b/lib/airtable_error.js
index ad5b3db2..09311f0d 100644
--- a/lib/airtable_error.js
+++ b/lib/airtable_error.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 function AirtableError(error, message, statusCode) {
diff --git a/lib/base.js b/lib/base.js
index f9d9cae6..77b980d2 100644
--- a/lib/base.js
+++ b/lib/base.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 var forEach = require('lodash/forEach');
diff --git a/lib/callback_to_promise.js b/lib/callback_to_promise.js
index 843667f1..755102c4 100644
--- a/lib/callback_to_promise.js
+++ b/lib/callback_to_promise.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 var Promise = require('./promise');
diff --git a/lib/deprecate.js b/lib/deprecate.js
index a8f29934..e7d3c9a0 100644
--- a/lib/deprecate.js
+++ b/lib/deprecate.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 var didWarnForDeprecation = {};
diff --git a/lib/http_headers.js b/lib/http_headers.js
index 20299cd3..bb1373b6 100644
--- a/lib/http_headers.js
+++ b/lib/http_headers.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 var forEach = require('lodash/forEach');
 
 var isBrowser = typeof window !== 'undefined';
diff --git a/lib/object_to_query_param_string.js b/lib/object_to_query_param_string.js
index b10b8889..445abce7 100644
--- a/lib/object_to_query_param_string.js
+++ b/lib/object_to_query_param_string.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 var isArray = require('lodash/isArray');
diff --git a/lib/promise.js b/lib/promise.js
index 91fdcb68..a8a88a0a 100644
--- a/lib/promise.js
+++ b/lib/promise.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 /* global Promise */
 var polyfill = require('es6-promise');
 
diff --git a/lib/query.js b/lib/query.js
index 26a2fca8..3a14b518 100644
--- a/lib/query.js
+++ b/lib/query.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 var isPlainObject = require('lodash/isPlainObject');
diff --git a/lib/record.js b/lib/record.js
index 2de5a2d9..4dacd93b 100644
--- a/lib/record.js
+++ b/lib/record.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 var assign = require('lodash/assign');
diff --git a/lib/run_action.js b/lib/run_action.js
index 0f459e5d..c1248629 100644
--- a/lib/run_action.js
+++ b/lib/run_action.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 var exponentialBackoffWithJitter = require('./exponential_backoff_with_jitter');
diff --git a/lib/table.js b/lib/table.js
index be3505e9..5a114686 100644
--- a/lib/table.js
+++ b/lib/table.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 var isArray = require('lodash/isArray');
diff --git a/lib/typecheck.js b/lib/typecheck.js
index 1ff63c72..f2655659 100644
--- a/lib/typecheck.js
+++ b/lib/typecheck.js
@@ -1,3 +1,4 @@
+// istanbul ignore file
 'use strict';
 
 var includes = require('lodash/includes');
diff --git a/package.json b/package.json
index 0c797901..4c88931e 100644
--- a/package.json
+++ b/package.json
@@ -6,10 +6,12 @@
   "repository": "git://github.com/airtable/airtable.js.git",
   "private": false,
   "scripts": {
+    "coverage": "jest --env node --coverage",
     "pretest": "npm run lint",
     "lint": "eslint .",
     "format": "prettier --write '**/*.js'",
-    "test": "jest --env node"
+    "test": "npm run coverage && npm run test-unit",
+    "test-unit": "jest --env node"
   },
   "dependencies": {
     "es6-promise": "4.2.8",
@@ -29,6 +31,16 @@
     "/build/airtable.browser.js",
     "/lib/"
   ],
+  "jest": {
+    "coverageThreshold": {
+      "global": {
+        "branches": 100,
+        "functions": 100,
+        "lines": 100,
+        "statements": 100
+      }
+    }
+  },
   "devDependencies": {
     "body-parser": "^1.19.0",
     "envify": "^4.1.0",
diff --git a/test/airtable.test.js b/test/airtable.test.js
index c622be7b..e17f4bd7 100644
--- a/test/airtable.test.js
+++ b/test/airtable.test.js
@@ -10,4 +10,73 @@ describe('Airtable', function() {
             expect(value).not.toEqual('keyXyz');
         });
     });
+
+    it('recognizes API key as a property of the constructor', function() {
+        try {
+            Airtable.apiKey = 'keyAbc';
+            new Airtable({});
+            new Airtable();
+        } finally {
+            delete Airtable.apiKey;
+        }
+    });
+
+    it('recognizes API key as an environment variable', function() {
+        try {
+            process.env.AIRTABLE_API_KEY = 'keyDef';
+            new Airtable({});
+            new Airtable();
+        } finally {
+            delete process.env.AIRTABLE_API_KEY;
+        }
+    });
+
+    it('throws when API key is not provided', function() {
+        expect(function() {
+            new Airtable({});
+        }).toThrow();
+
+        expect(function() {
+            new Airtable();
+        }).toThrow();
+    });
+
+    describe('configure static method', function() {
+        it('sets the apiKey', function() {
+            Airtable.configure({apiKey: 'keyGhi'});
+
+            try {
+                expect(Airtable.apiKey).toEqual('keyGhi');
+            } finally {
+                delete Airtable.apiKey;
+            }
+        });
+    });
+
+    describe('base static method', function() {
+        it('throws in the absense of an API key', function() {
+            expect(function() {
+                Airtable.base('abaseid');
+            });
+        });
+
+        it('returns a Base instance configured with the given ID', function() {
+            try {
+                Airtable.apiKey = 'keyJkl';
+                var base = Airtable.base('abaseid');
+
+                expect(base.getId()).toBe('abaseid');
+            } finally {
+                delete Airtable.apiKey;
+            }
+        });
+    });
+
+    describe('base instance method', function() {
+        it('returns a Base instance configured with the given ID', function() {
+            var base = new Airtable({apiKey: 'keyMno'}).base('anotherbaseid');
+
+            expect(base.getId()).toBe('anotherbaseid');
+        });
+    });
 });
diff --git a/test/test_helpers.js b/test/test_helpers.js
index 983aeaf1..8933b3e6 100644
--- a/test/test_helpers.js
+++ b/test/test_helpers.js
@@ -111,6 +111,7 @@ function getMockEnvironmentAsync(options) {
         res.json({error: 'NOT_FOUND'});
     });
 
+    // istanbul ignore next
     // eslint-disable-next-line no-unused-vars
     app.use(function(err, req, res, next) {
         console.error(err);
@@ -134,6 +135,7 @@ function getMockEnvironmentAsync(options) {
             }
 
             testServer.listen(testServerPort, function(err) {
+                // istanbul ignore if
                 if (err) {
                     reject(err);
                 } else {
@@ -156,6 +158,7 @@ function _checkParamsMiddleware(req, res, next) {
         req.get('authorization') === 'Bearer key123' &&
         req.params.baseId === 'app123' &&
         req.params.tableIdOrName === 'Table';
+    // istanbul ignore else
     if (areParamsValid) {
         next();
     } else {