diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index fb83804..d49bee4 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -37,6 +37,7 @@
 		testfdt3 = "/b-test";
 		testfdt5 = "/some-bus/c-test@5";
 		testfdt8 = "/a-test";
+		testfdtm1 = &testfdtm1;
 		fdt-dummy0 = "/translation-test@8000/dev@0,0";
 		fdt-dummy1 = "/translation-test@8000/dev@1,100";
 		fdt-dummy2 = "/translation-test@8000/dev@2,200";
@@ -917,6 +918,18 @@
 		idle-state = <0xabcd>;
 	};
 
+	testfdtm0 {
+		compatible = "denx,u-boot-fdtm-test";
+	};
+
+	testfdtm1: testfdtm1 {
+		compatible = "denx,u-boot-fdtm-test";
+	};
+
+	testfdtm2 {
+		compatible = "denx,u-boot-fdtm-test";
+	};
+
 	timer@0 {
 		compatible = "sandbox,timer";
 		clock-frequency = <1000000>;
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index e952a99..ae4425d 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -16,6 +16,7 @@
 	UCLASS_DEMO,
 	UCLASS_TEST,
 	UCLASS_TEST_FDT,
+	UCLASS_TEST_FDT_MANUAL,
 	UCLASS_TEST_BUS,
 	UCLASS_TEST_PROBE,
 	UCLASS_TEST_DUMMY,
diff --git a/test/dm/test-fdt.c b/test/dm/test-fdt.c
index f73cc33..87e09f1 100644
--- a/test/dm/test-fdt.c
+++ b/test/dm/test-fdt.c
@@ -126,6 +126,23 @@
 	.flags		= DM_UC_FLAG_SEQ_ALIAS,
 };
 
+static const struct udevice_id testfdtm_ids[] = {
+	{ .compatible = "denx,u-boot-fdtm-test" },
+	{ }
+};
+
+U_BOOT_DRIVER(testfdtm_drv) = {
+	.name	= "testfdtm_drv",
+	.of_match	= testfdtm_ids,
+	.id	= UCLASS_TEST_FDT_MANUAL,
+};
+
+UCLASS_DRIVER(testfdtm) = {
+	.name		= "testfdtm",
+	.id		= UCLASS_TEST_FDT_MANUAL,
+	.flags		= DM_UC_FLAG_SEQ_ALIAS | DM_UC_FLAG_NO_AUTO_SEQ,
+};
+
 struct dm_testprobe_pdata {
 	int probe_err;
 };
@@ -399,6 +416,31 @@
 }
 DM_TEST(dm_test_fdt_uclass_seq, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
 
+/* More tests for sequence numbers */
+static int dm_test_fdt_uclass_seq_manual(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+
+	/*
+	 * Since DM_UC_FLAG_NO_AUTO_SEQ is set for this uclass, only testfdtm1
+	 * should get a sequence number assigned
+	 */
+	ut_assertok(uclass_get_device(UCLASS_TEST_FDT_MANUAL, 0, &dev));
+	ut_asserteq_str("testfdtm0", dev->name);
+	ut_asserteq(-1, dev_seq(dev));
+
+	ut_assertok(uclass_get_device_by_seq(UCLASS_TEST_FDT_MANUAL, 1, &dev));
+	ut_asserteq_str("testfdtm1", dev->name);
+	ut_asserteq(1, dev_seq(dev));
+
+	ut_assertok(uclass_get_device(UCLASS_TEST_FDT_MANUAL, 2, &dev));
+	ut_asserteq_str("testfdtm2", dev->name);
+	ut_asserteq(-1, dev_seq(dev));
+
+	return 0;
+}
+DM_TEST(dm_test_fdt_uclass_seq_manual, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+
 /* Test that we can find a device by device tree offset */
 static int dm_test_fdt_offset(struct unit_test_state *uts)
 {