diff --git a/lib/unexpectedMitm.js b/lib/unexpectedMitm.js
index a078f60..5aa0d48 100644
--- a/lib/unexpectedMitm.js
+++ b/lib/unexpectedMitm.js
@@ -829,9 +829,20 @@ module.exports = {
             .addAssertion('<any> with http mocked out [and verified] [with extra info] <array|object> <assertion>', function (expect, subject, requestDescriptions) { // ...
                 expect.errorMode = 'nested';
                 var mitm = createMitm();
+                var cleanedUpMitm = false;
                 var shouldBeVerified = checkEnvFlag('UNEXPECTED_MITM_VERIFY') || expect.flags['and verified'];
                 var shouldReturnExtraInfo = expect.flags['with extra info'];
 
+                // XXX: Register footgun detection in case an uncaught exception
+                // breaks the test in such a way that our finally block will not
+                // be called, and mitm thus will not be cleaned up.
+                afterEach(function () {
+                    if (!cleanedUpMitm) {
+                        cleanedUpMitm = true;
+                        mitm.disable();
+                    }
+                });
+
                 if (!Array.isArray(requestDescriptions)) {
                     if (typeof requestDescriptions === 'undefined') {
                         requestDescriptions = [];
@@ -1120,6 +1131,7 @@ module.exports = {
                         }
                     });
                 }).finally(function () {
+                    cleanedUpMitm = true;
                     mitm.disable();
                 });