diff --git a/subprojects/gst-plugins-bad/tests/check/elements/vapostproc.c b/subprojects/gst-plugins-bad/tests/check/elements/vapostproc.c
index daa9e007bb..959123c51a 100644
--- a/subprojects/gst-plugins-bad/tests/check/elements/vapostproc.c
+++ b/subprojects/gst-plugins-bad/tests/check/elements/vapostproc.c
@@ -62,18 +62,73 @@ GST_START_TEST (raw_copy)
 
 GST_END_TEST;
 
+static GstCaps *
+get_drmdma_format (void)
+{
+  GstElement *vpp;
+  GstCaps *templ, *allowed_caps, *drm_caps = NULL;
+  GstPad *srcpad;
+  guint i;
+
+  vpp = gst_element_factory_make ("vapostproc", NULL);
+  if (!vpp)
+    return NULL;
+  srcpad = gst_element_get_static_pad (vpp, "src");
+  fail_unless (srcpad != NULL);
+  templ = gst_pad_get_pad_template_caps (srcpad);
+  fail_unless (templ != NULL);
+
+  allowed_caps = gst_caps_normalize (templ);
+
+  for (i = 0; i < gst_caps_get_size (allowed_caps); ++i) {
+    GstStructure *new_structure;
+    GstStructure *structure;
+
+    /* non-dmabuf caps don't describe drm-format: skip them */
+    structure = gst_caps_get_structure (allowed_caps, i);
+    if (!gst_structure_has_field (structure, "drm-format"))
+      continue;
+
+    drm_caps = gst_caps_new_empty ();
+    new_structure = gst_structure_copy (structure);
+    gst_structure_set (new_structure, "framerate", GST_TYPE_FRACTION,
+        1, 1, NULL);
+    gst_structure_remove_field (new_structure, "width");
+    gst_structure_remove_field (new_structure, "height");
+    gst_caps_append_structure (drm_caps, new_structure);
+    gst_caps_set_features_simple (drm_caps,
+        gst_caps_features_new_single ("memory:DMABuf"));
+
+    GST_DEBUG ("have caps %" GST_PTR_FORMAT, drm_caps);
+    /* should be fixed without width/height */
+    fail_unless (gst_caps_is_fixed (drm_caps));
+    break;
+  }
+
+  gst_caps_unref (allowed_caps);
+  gst_object_unref (srcpad);
+  gst_object_unref (vpp);
+
+  return drm_caps;
+}
+
 GST_START_TEST (dmabuf_copy)
 {
   GstHarness *h;
   GstBuffer *buf, *buf_copy;
   gboolean ret;
+  GstCaps *drm_caps;
 
   h = gst_harness_new_parse ("videotestsrc num-buffers=1 ! "
       "video/x-raw, width=(int)1024, height=(int)768 ! vapostproc");
   ck_assert (h);
 
-  gst_harness_set_sink_caps_str (h,
-      "video/x-raw(memory:DMABuf), format=(string)NV12, width=(int)3840, height=(int)2160");
+  drm_caps = get_drmdma_format ();
+  ck_assert (drm_caps);
+  gst_caps_set_simple (drm_caps, "width", G_TYPE_INT, 1600, "height",
+      G_TYPE_INT, 1200, NULL);
+
+  gst_harness_set_sink_caps (h, drm_caps);
 
   gst_harness_add_propose_allocation_meta (h, GST_VIDEO_META_API_TYPE, NULL);
   gst_harness_play (h);