diff --git a/package.json b/package.json
index 46affd554..842310cff 100644
--- a/package.json
+++ b/package.json
@@ -64,6 +64,7 @@
     "jasmine-node": "^1.14.5",
     "jsdoc": "^3.4.0",
     "rimraf": "^2.5.4",
+    "source-map-support": "^0.4.11",
     "sourceify": "^0.1.0",
     "uglifyjs": "^2.4.10",
     "watchify": "^3.2.1"
diff --git a/spec/integ/matrix-client-crypto.spec.js b/spec/integ/matrix-client-crypto.spec.js
index 78fbcb717..e36ba6b0a 100644
--- a/spec/integ/matrix-client-crypto.spec.js
+++ b/spec/integ/matrix-client-crypto.spec.js
@@ -24,6 +24,7 @@ limitations under the License.
  */
 
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const q = require("q");
 const utils = require("../../lib/utils");
diff --git a/spec/integ/matrix-client-event-emitter.spec.js b/spec/integ/matrix-client-event-emitter.spec.js
index 4f698b176..51c4abad8 100644
--- a/spec/integ/matrix-client-event-emitter.spec.js
+++ b/spec/integ/matrix-client-event-emitter.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const HttpBackend = require("../mock-request");
 const utils = require("../test-utils");
diff --git a/spec/integ/matrix-client-event-timeline.spec.js b/spec/integ/matrix-client-event-timeline.spec.js
index 3291c9cfd..293d05955 100644
--- a/spec/integ/matrix-client-event-timeline.spec.js
+++ b/spec/integ/matrix-client-event-timeline.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const q = require("q");
 const sdk = require("../..");
 const HttpBackend = require("../mock-request");
diff --git a/spec/integ/matrix-client-methods.spec.js b/spec/integ/matrix-client-methods.spec.js
index b87d255d2..82febe618 100644
--- a/spec/integ/matrix-client-methods.spec.js
+++ b/spec/integ/matrix-client-methods.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const HttpBackend = require("../mock-request");
 const publicGlobals = require("../../lib/matrix");
diff --git a/spec/integ/matrix-client-opts.spec.js b/spec/integ/matrix-client-opts.spec.js
index 710893e01..773ddfdaa 100644
--- a/spec/integ/matrix-client-opts.spec.js
+++ b/spec/integ/matrix-client-opts.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const MatrixClient = sdk.MatrixClient;
 const HttpBackend = require("../mock-request");
diff --git a/spec/integ/matrix-client-retrying.spec.js b/spec/integ/matrix-client-retrying.spec.js
index 4df7d422c..0553d3a03 100644
--- a/spec/integ/matrix-client-retrying.spec.js
+++ b/spec/integ/matrix-client-retrying.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const HttpBackend = require("../mock-request");
 const utils = require("../test-utils");
diff --git a/spec/integ/matrix-client-room-timeline.spec.js b/spec/integ/matrix-client-room-timeline.spec.js
index a3eff279a..774f54a21 100644
--- a/spec/integ/matrix-client-room-timeline.spec.js
+++ b/spec/integ/matrix-client-room-timeline.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const EventStatus = sdk.EventStatus;
 const HttpBackend = require("../mock-request");
diff --git a/spec/integ/matrix-client-syncing.spec.js b/spec/integ/matrix-client-syncing.spec.js
index 641c59b99..ff9d248de 100644
--- a/spec/integ/matrix-client-syncing.spec.js
+++ b/spec/integ/matrix-client-syncing.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const HttpBackend = require("../mock-request");
 const utils = require("../test-utils");
diff --git a/spec/integ/megolm.spec.js b/spec/integ/megolm.spec.js
index 8ecf90ec9..714411d72 100644
--- a/spec/integ/megolm.spec.js
+++ b/spec/integ/megolm.spec.js
@@ -16,6 +16,7 @@ limitations under the License.
 
 "use strict";
 
+import 'source-map-support/register';
 
 let Olm = null;
 try {
diff --git a/spec/unit/content-repo.spec.js b/spec/unit/content-repo.spec.js
index 6da3015b3..970976158 100644
--- a/spec/unit/content-repo.spec.js
+++ b/spec/unit/content-repo.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const ContentRepo = require("../../lib/content-repo");
 const testUtils = require("../test-utils");
 
diff --git a/spec/unit/crypto.spec.js b/spec/unit/crypto.spec.js
index 6f347bb49..8fc7341e0 100644
--- a/spec/unit/crypto.spec.js
+++ b/spec/unit/crypto.spec.js
@@ -1,6 +1,6 @@
 
 "use strict";
-
+import 'source-map-support/register';
 const sdk = require("../..");
 let Crypto;
 if (sdk.CRYPTO_ENABLED) {
diff --git a/spec/unit/event-timeline.spec.js b/spec/unit/event-timeline.spec.js
index bf2230508..f893f92aa 100644
--- a/spec/unit/event-timeline.spec.js
+++ b/spec/unit/event-timeline.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const EventTimeline = sdk.EventTimeline;
 const utils = require("../test-utils");
diff --git a/spec/unit/filter.spec.js b/spec/unit/filter.spec.js
index 9a28c2b03..55046dbcb 100644
--- a/spec/unit/filter.spec.js
+++ b/spec/unit/filter.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const Filter = sdk.Filter;
 const utils = require("../test-utils");
diff --git a/spec/unit/interactive-auth.spec.js b/spec/unit/interactive-auth.spec.js
index 5c783db3d..d0bdf2ea4 100644
--- a/spec/unit/interactive-auth.spec.js
+++ b/spec/unit/interactive-auth.spec.js
@@ -15,6 +15,7 @@ limitations under the License.
 */
 "use strict";
 
+import 'source-map-support/register';
 const q = require("q");
 const sdk = require("../..");
 const utils = require("../test-utils");
diff --git a/spec/unit/matrix-client.spec.js b/spec/unit/matrix-client.spec.js
index bf3ecf86d..f6f079aef 100644
--- a/spec/unit/matrix-client.spec.js
+++ b/spec/unit/matrix-client.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const q = require("q");
 const sdk = require("../..");
 const MatrixClient = sdk.MatrixClient;
diff --git a/spec/unit/pushprocessor.spec.js b/spec/unit/pushprocessor.spec.js
index 9c09771b5..96d183d1e 100644
--- a/spec/unit/pushprocessor.spec.js
+++ b/spec/unit/pushprocessor.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const PushProcessor = require("../../lib/pushprocessor");
 const utils = require("../test-utils");
 
diff --git a/spec/unit/realtime-callbacks.spec.js b/spec/unit/realtime-callbacks.spec.js
index 92ed513db..c14594b60 100644
--- a/spec/unit/realtime-callbacks.spec.js
+++ b/spec/unit/realtime-callbacks.spec.js
@@ -1,5 +1,6 @@
 "use strict";
 
+import 'source-map-support/register';
 const callbacks = require("../../lib/realtime-callbacks");
 const testUtils = require("../test-utils.js");
 
diff --git a/spec/unit/room-member.spec.js b/spec/unit/room-member.spec.js
index 04622c6ab..2f03afaaf 100644
--- a/spec/unit/room-member.spec.js
+++ b/spec/unit/room-member.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const RoomMember = sdk.RoomMember;
 const utils = require("../test-utils");
diff --git a/spec/unit/room-state.spec.js b/spec/unit/room-state.spec.js
index 8409da86b..cad3b2356 100644
--- a/spec/unit/room-state.spec.js
+++ b/spec/unit/room-state.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const RoomState = sdk.RoomState;
 const RoomMember = sdk.RoomMember;
diff --git a/spec/unit/room.spec.js b/spec/unit/room.spec.js
index b6820ecdd..a5ce52b2a 100644
--- a/spec/unit/room.spec.js
+++ b/spec/unit/room.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const Room = sdk.Room;
 const RoomState = sdk.RoomState;
diff --git a/spec/unit/scheduler.spec.js b/spec/unit/scheduler.spec.js
index fd3b9ab2e..e8a38efce 100644
--- a/spec/unit/scheduler.spec.js
+++ b/spec/unit/scheduler.spec.js
@@ -1,6 +1,7 @@
 // This file had a function whose name is all caps, which displeases eslint
 /* eslint new-cap: "off" */
 
+import 'source-map-support/register';
 const q = require("q");
 const sdk = require("../..");
 const MatrixScheduler = sdk.MatrixScheduler;
diff --git a/spec/unit/timeline-window.spec.js b/spec/unit/timeline-window.spec.js
index 68cab72b0..b3e452534 100644
--- a/spec/unit/timeline-window.spec.js
+++ b/spec/unit/timeline-window.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const q = require("q");
 const sdk = require("../..");
 const EventTimeline = sdk.EventTimeline;
diff --git a/spec/unit/user.spec.js b/spec/unit/user.spec.js
index 51a8f68d1..661123a47 100644
--- a/spec/unit/user.spec.js
+++ b/spec/unit/user.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const sdk = require("../..");
 const User = sdk.User;
 const utils = require("../test-utils");
diff --git a/spec/unit/utils.spec.js b/spec/unit/utils.spec.js
index 1836ad218..d92947bb3 100644
--- a/spec/unit/utils.spec.js
+++ b/spec/unit/utils.spec.js
@@ -1,4 +1,5 @@
 "use strict";
+import 'source-map-support/register';
 const utils = require("../../lib/utils");
 const testUtils = require("../test-utils");