diff --git a/test/dm/Makefile b/test/dm/Makefile
index c363ca47a6..6275ec56ea 100644
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_UT_DM) += test-uclass.o
 
 obj-$(CONFIG_UT_DM) += core.o
 obj-$(CONFIG_UT_DM) += read.o
+obj-$(CONFIG_UT_DM) += phys2bus.o
 ifneq ($(CONFIG_SANDBOX),)
 obj-$(CONFIG_ACPIGEN) += acpi.o
 obj-$(CONFIG_ACPIGEN) += acpigen.o
diff --git a/test/dm/phys2bus.c b/test/dm/phys2bus.c
new file mode 100644
index 0000000000..342f2fa8eb
--- /dev/null
+++ b/test/dm/phys2bus.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2020 Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <mapmem.h>
+#include <phys2bus.h>
+#include <dm/device.h>
+#include <dm/ofnode.h>
+#include <dm/root.h>
+#include <dm/test.h>
+#include <dm/uclass-internal.h>
+#include <test/ut.h>
+
+static int dm_test_phys_to_bus(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+	ofnode node;
+
+	node = ofnode_path("/mmio-bus@0");
+	ut_assert(ofnode_valid(node));
+	ut_assertok(uclass_get_device_by_ofnode(UCLASS_TEST_BUS, node, &dev));
+	/* In this case it should be transparent, no dma-ranges in parent bus */
+	ut_asserteq_addr((void*)0xfffffULL, (void*)dev_phys_to_bus(dev, 0xfffff));
+	ut_asserteq_addr((void*)0xfffffULL, (void*)(ulong)dev_bus_to_phys(dev, 0xfffff));
+
+	node = ofnode_path("/mmio-bus@0/subnode@0");
+	ut_assert(ofnode_valid(node));
+	ut_assertok(uclass_get_device_by_ofnode(UCLASS_TEST_FDT, node, &dev));
+	ut_asserteq_addr((void*)0x100fffffULL, (void*)dev_phys_to_bus(dev, 0xfffff));
+	ut_asserteq_addr((void*)0xfffffULL, (void*)(ulong)dev_bus_to_phys(dev, 0x100fffff));
+
+	return 0;
+}
+DM_TEST(dm_test_phys_to_bus, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);