diff --git a/package-lock.json b/package-lock.json
index 4a6aebd..c8012dd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -547,6 +547,11 @@
 				"nodeify-ts": "1.0.6"
 			}
 		},
+		"dotenv": {
+			"version": "8.0.0",
+			"resolved": "https://registry.npmjs.org/dotenv/-/dotenv-8.0.0.tgz",
+			"integrity": "sha512-30xVGqjLjiUOArT4+M5q9sYdvuR4riM6yK9wMcas9Vbp6zZa+ocC9dp6QoftuhTPhFAiLK/0C5Ni2nou/Bk8lg=="
+		},
 		"ecurve": {
 			"version": "1.0.6",
 			"resolved": "https://registry.npmjs.org/ecurve/-/ecurve-1.0.6.tgz",
diff --git a/package.json b/package.json
index 48e7f95..c0404d8 100644
--- a/package.json
+++ b/package.json
@@ -68,6 +68,7 @@
 		"commander": "2.20.0",
 		"deep-equal-in-any-order": "1.0.13",
 		"docker-cli-js": "2.5.2",
+		"dotenv": "8.0.0",
 		"glob": "7.1.4",
 		"mkdirp": "0.5.1",
 		"mocha": "6.1.4",
diff --git a/src/cli/utils.ts b/src/cli/utils.ts
index 2570a08..425c57b 100644
--- a/src/cli/utils.ts
+++ b/src/cli/utils.ts
@@ -248,6 +248,12 @@ export const runTests = async () => {
 	if (await exists(path.join(WORKING_DIRECTORY, 'tsconfig.json'))) {
 		require('ts-mocha');
 	}
+
+	// Register their .env file variables if they have one.
+	if (await exists(path.join(WORKING_DIRECTORY, '.env'))) {
+		require('dotenv').config({ path: path.join(WORKING_DIRECTORY, '.env') });
+	}
+
 	// Find all existing test file paths
 	const files = [
 		// All ts and js files under the test folder get added.