diff --git a/tools/testing/selftests/firmware/fw_fallback.sh b/tools/testing/selftests/firmware/fw_fallback.sh
index 9337a0328627..8e2e34a2ca69 100755
--- a/tools/testing/selftests/firmware/fw_fallback.sh
+++ b/tools/testing/selftests/firmware/fw_fallback.sh
@@ -238,8 +238,10 @@ run_sysfs_main_tests()
 
 run_sysfs_custom_load_tests()
 {
-	if load_fw_custom "$NAME" "$FW" ; then
-		if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then
+	RANDOM_FILE_PATH=$(setup_random_file)
+	RANDOM_FILE="$(basename $RANDOM_FILE_PATH)"
+	if load_fw_custom "$RANDOM_FILE" "$RANDOM_FILE_PATH" ; then
+		if ! diff -q "$RANDOM_FILE_PATH" /dev/test_firmware >/dev/null ; then
 			echo "$0: firmware was not loaded" >&2
 			exit 1
 		else
@@ -247,8 +249,10 @@ run_sysfs_custom_load_tests()
 		fi
 	fi
 
-	if load_fw_custom "$NAME" "$FW" ; then
-		if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then
+	RANDOM_FILE_PATH=$(setup_random_file)
+	RANDOM_FILE="$(basename $RANDOM_FILE_PATH)"
+	if load_fw_custom "$RANDOM_FILE" "$RANDOM_FILE_PATH" ; then
+		if ! diff -q "$RANDOM_FILE_PATH" /dev/test_firmware >/dev/null ; then
 			echo "$0: firmware was not loaded" >&2
 			exit 1
 		else
@@ -256,8 +260,12 @@ run_sysfs_custom_load_tests()
 		fi
 	fi
 
-	if load_fw_custom_cancel "nope-$NAME" "$FW" ; then
-		if diff -q "$FW" /dev/test_firmware >/dev/null ; then
+	RANDOM_FILE_REAL="$RANDOM_FILE_PATH"
+	FAKE_RANDOM_FILE_PATH=$(setup_random_file_fake)
+	FAKE_RANDOM_FILE="$(basename $FAKE_RANDOM_FILE_PATH)"
+
+	if load_fw_custom_cancel "$FAKE_RANDOM_FILE" "$RANDOM_FILE_REAL" ; then
+		if diff -q "$RANDOM_FILE_PATH" /dev/test_firmware >/dev/null ; then
 			echo "$0: firmware was expected to be cancelled" >&2
 			exit 1
 		else
diff --git a/tools/testing/selftests/firmware/fw_filesystem.sh b/tools/testing/selftests/firmware/fw_filesystem.sh
index 7f47877fa7fa..6452d2129cd9 100755
--- a/tools/testing/selftests/firmware/fw_filesystem.sh
+++ b/tools/testing/selftests/firmware/fw_filesystem.sh
@@ -230,10 +230,13 @@ test_wait_and_cancel_custom_load()
 test_request_firmware_nowait_custom_nofile()
 {
 	echo -n "Batched request_firmware_nowait(uevent=false) nofile try #$1: "
+	config_reset
 	config_unset_uevent
-	config_set_name nope-test-firmware.bin
+	RANDOM_FILE_PATH=$(setup_random_file_fake)
+	RANDOM_FILE="$(basename $RANDOM_FILE_PATH)"
+	config_set_name $RANDOM_FILE
 	config_trigger_async &
-	test_wait_and_cancel_custom_load nope-test-firmware.bin
+	test_wait_and_cancel_custom_load $RANDOM_FILE
 	wait
 	release_all_firmware
 	echo "OK"
@@ -271,7 +274,11 @@ test_request_firmware_nowait_uevent()
 test_request_firmware_nowait_custom()
 {
 	echo -n "Batched request_firmware_nowait(uevent=false) try #$1: "
+	config_reset
 	config_unset_uevent
+	RANDOM_FILE_PATH=$(setup_random_file)
+	RANDOM_FILE="$(basename $RANDOM_FILE_PATH)"
+	config_set_name $RANDOM_FILE
 	config_trigger_async
 	release_all_firmware
 	echo "OK"
diff --git a/tools/testing/selftests/firmware/fw_lib.sh b/tools/testing/selftests/firmware/fw_lib.sh
index 98dceb847ba0..9ea31b57d71a 100755
--- a/tools/testing/selftests/firmware/fw_lib.sh
+++ b/tools/testing/selftests/firmware/fw_lib.sh
@@ -104,6 +104,29 @@ setup_tmp_file()
 	fi
 }
 
+__setup_random_file()
+{
+	RANDOM_FILE_PATH="$(mktemp -p $FWPATH)"
+	# mktemp says dry-run -n is unsafe, so...
+	if [[ "$1" = "fake" ]]; then
+		rm -rf $RANDOM_FILE_PATH
+		sync
+	else
+		echo "ABCD0123" >"$RANDOM_FILE_PATH"
+	fi
+	echo $RANDOM_FILE_PATH
+}
+
+setup_random_file()
+{
+	echo $(__setup_random_file)
+}
+
+setup_random_file_fake()
+{
+	echo $(__setup_random_file fake)
+}
+
 proc_set_force_sysfs_fallback()
 {
 	if [ -f $FW_FORCE_SYSFS_FALLBACK ]; then