diff --git a/debian/tests/test-common b/debian/tests/test-common
index 981aafe..d10d59c 100644
--- a/debian/tests/test-common
+++ b/debian/tests/test-common
@@ -13,6 +13,15 @@ if [ -z "$KVER" ]; then
 	exit 2
 fi
 
+# If any built-in drivers request firmware, create dummy files to
+# avoid warnings for this (see #1078168).
+tr '\0' '\n' < "/lib/modules/$KVER/modules.builtin.modinfo" \
+| sed -n -e 's/^[^=]*\.firmware=//p' \
+| while read fw_file; do
+	mkdir -p "/lib/firmware/$(dirname "$fw_file")"
+	touch "/lib/firmware/$fw_file"
+done
+
 case "$(dpkg --print-architecture)" in
 arm64)
 	# The Ubuntu arm64 autopkgtest runs rarely into the 1200 seconds timeout.