diff --git a/python/src/main/python/drivers/vkrun.py b/python/src/main/python/drivers/vkrun.py
index 7f9765579..dc0ce158e 100755
--- a/python/src/main/python/drivers/vkrun.py
+++ b/python/src/main/python/drivers/vkrun.py
@@ -26,7 +26,7 @@
 
 LOGFILE = 'vklog.txt'
 TIMEOUT_RUN = 30
-NUM_RENDER=3
+NUM_RENDER = 3
 
 ################################################################################
 # Common
@@ -127,17 +127,15 @@ def run_android(vert, frag, json, skip_render):
     adb('push ' + frag + ' ' + ANDROID_SDCARD + '/test.frag.spv')
     adb('push ' + json + ' ' + ANDROID_SDCARD + '/test.json')
 
+    adb('logcat -c')
 
+    cmd = 'shell am start -n ' + ANDROID_APP + '/android.app.NativeActivity'
+    flags = '--num-render {}'.format(NUM_RENDER)
     if skip_render:
-        adb('shell touch ' + ANDROID_SDCARD + '/SKIP_RENDER')
-
-    adb('logcat -c')
-    cmd = ANDROID_APP + '/android.app.NativeActivity'
-    # Explicitely set all options, don't rely on defaults
-    flags = '--num-render {} --png-template image --sanity-before sanity_before.png --sanity-after sanity_after.png'.format(NUM_RENDER)
+      flags += ' --skip-render'
     # Pass command line args as Intent extra. Need to nest-quote, hence the "\'blabla\'"
-    cmd += '-e gfz "\'' + flags + '\'"'
-    adb('shell am start ' + ANDROID_APP + '/android.app.NativeActivity')
+    cmd += ' -e gfz "\'' + flags + '\'"'
+    adb(cmd)
 
     # Busy wait
     deadline = time.time() + TIMEOUT_APP