diff --git a/src/components/mediaViewer/SeekLine.tsx b/src/components/mediaViewer/SeekLine.tsx
index 77c7b205d..8bc900301 100644
--- a/src/components/mediaViewer/SeekLine.tsx
+++ b/src/components/mediaViewer/SeekLine.tsx
@@ -10,7 +10,7 @@ import useSignal from '../../hooks/useSignal';
 import useCurrentTimeSignal from './hooks/currentTimeSignal';
 
 import { captureEvents } from '../../util/captureEvents';
-import { IS_TOUCH_ENV, IS_VIDEO_PREVIEW_SUPPORTED } from '../../util/windowEnvironment';
+import { IS_TOUCH_ENV } from '../../util/windowEnvironment';
 import buildClassName from '../../util/buildClassName';
 import { formatMediaDuration } from '../../util/dateFormat';
 import { clamp, round } from '../../util/math';
@@ -67,14 +67,13 @@ const SeekLine: React.FC<OwnProps> = ({
   }, [posterSize]);
 
   const setPreview = useLastCallback((time: number) => {
-    if (!IS_VIDEO_PREVIEW_SUPPORTED) return;
     time = Math.floor(time);
     setPreviewTime(time);
     renderVideoPreview(time);
   });
 
   useEffect(() => {
-    if (!IS_VIDEO_PREVIEW_SUPPORTED || isPreviewDisabled || !url || !isReady) return undefined;
+    if (isPreviewDisabled || !url || !isReady) return undefined;
     return createVideoPreviews(url, previewCanvasRef.current!);
   }, [url, isReady, isPreviewDisabled]);
 
diff --git a/src/util/launchMediaWorkers.ts b/src/util/launchMediaWorkers.ts
index 4e425fe40..1724cbb0e 100644
--- a/src/util/launchMediaWorkers.ts
+++ b/src/util/launchMediaWorkers.ts
@@ -1,7 +1,7 @@
 import type { MediaWorkerApi } from '../lib/mediaWorker/index.worker';
 import type { Connector } from './PostMessageConnector';
 
-import { IS_VIDEO_PREVIEW_SUPPORTED } from './windowEnvironment';
+import { IS_TEST } from '../config';
 import { createConnector } from './PostMessageConnector';
 
 export const MAX_WORKERS = Math.min(navigator.hardwareConcurrency || 4, 4);
@@ -12,7 +12,7 @@ let instances: {
 }[] | undefined;
 
 export default function launchMediaWorkers() {
-  if (!IS_VIDEO_PREVIEW_SUPPORTED) return [];
+  if (IS_TEST) return [];
   if (!instances) {
     instances = new Array(MAX_WORKERS).fill(undefined).map(
       () => {
diff --git a/src/util/windowEnvironment.ts b/src/util/windowEnvironment.ts
index ff067f4ce..8dced680e 100644
--- a/src/util/windowEnvironment.ts
+++ b/src/util/windowEnvironment.ts
@@ -78,7 +78,6 @@ export const IS_CANVAS_FILTER_SUPPORTED = (
 export const IS_REQUEST_FULLSCREEN_SUPPORTED = 'requestFullscreen' in document.createElement('div');
 export const ARE_CALLS_SUPPORTED = !navigator.userAgent.includes('Firefox');
 export const LAYERS_ANIMATION_NAME = IS_ANDROID ? 'slideFade' : IS_IOS ? 'slideLayers' : 'pushSlide';
-export const IS_VIDEO_PREVIEW_SUPPORTED = !IS_TEST;
 
 const TEST_VIDEO = document.createElement('video');
 // `canPlayType(VIDEO_MOV_TYPE)` returns false negative at least for macOS Chrome and iOS Safari