diff --git a/win/tools/patch-tester/patch-tester.bat b/win/tools/patch-tester/patch-tester.bat
index 6e205b9..e1f3ef4 100755
--- a/win/tools/patch-tester/patch-tester.bat
+++ b/win/tools/patch-tester/patch-tester.bat
@@ -1,6 +1,6 @@
 @echo off
 
-ffmpeg.exe -y -hwaccel cuda -hwaccel_output_format cuda -f lavfi -i testsrc -t 50 ^
+ffmpeg.exe -y -init_hw_device cuda:0 -hwaccel cuda -hwaccel_output_format cuda -f lavfi -i testsrc2=d=150 ^
 -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 1M  -f null - ^
 -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 2M  -f null - ^
 -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 3M  -f null - ^
diff --git a/win/tools/patch-tester/patch-tester.ps1 b/win/tools/patch-tester/patch-tester.ps1
index 181a540..38ed762 100755
--- a/win/tools/patch-tester/patch-tester.ps1
+++ b/win/tools/patch-tester/patch-tester.ps1
@@ -1,6 +1,6 @@
 #!/usr/bin/env pwsh
 
-ffmpeg.exe -y -hwaccel cuda -hwaccel_output_format cuda -f lavfi -i testsrc -t 50 `
+ffmpeg.exe -y -init_hw_device cuda:0 -hwaccel cuda -hwaccel_output_format cuda -f lavfi -i testsrc2=d=150 `
 -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 1M  -f null - `
 -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 2M  -f null - `
 -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 3M  -f null - `