diff --git a/modules/renderer/map.js b/modules/renderer/map.js
index 0e5a7127cb..a288aef41b 100644
--- a/modules/renderer/map.js
+++ b/modules/renderer/map.js
@@ -653,6 +653,9 @@ export function rendererMap(context) {
 
 
     function redraw(difference, extent) {
+        // in unit tests, we need to abort if the test has already completed
+        if (typeof window === 'undefined') return;
+
         if (surface.empty() || !_redrawEnabled) return;
 
         // If we are in the middle of a zoom/pan, we can't do differenced redraws.
diff --git a/modules/util/session_mutex.js b/modules/util/session_mutex.js
index 99fdc94d93..42b61edcad 100644
--- a/modules/util/session_mutex.js
+++ b/modules/util/session_mutex.js
@@ -8,6 +8,9 @@ export function utilSessionMutex(name) {
     var intervalID;
 
     function renew() {
+        // in unit tests, we need to abort if the test has already completed
+        if (typeof window === 'undefined') return;
+
         var expires = new Date();
         expires.setSeconds(expires.getSeconds() + 5);
         document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
diff --git a/test/spec/services/panoramax.js b/test/spec/services/panoramax.js
index e418509046..c695754518 100644
--- a/test/spec/services/panoramax.js
+++ b/test/spec/services/panoramax.js
@@ -21,6 +21,9 @@ describe('iD.servicePanoramax', function() {
         panoramax = iD.services.panoramax;
         panoramax.reset();
         fetchMock.reset();
+
+        // never resolve
+        fetchMock.mock(/api\.panoramax\.xyz/, new Promise(() => {}));
     });
 
     afterEach(function() {