diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 8f93775ff4a..39d57f51102 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -28,6 +28,9 @@
 		ethernet3 = &eth_3;
 		ethernet4 = &dsa_eth0;
 		ethernet5 = &eth_5;
+		ethernet6 = "/eth@10004000";
+		ethernet7 = &swp_1;
+		ethernet8 = &phy_eth0;
 		gpio1 = &gpio_a;
 		gpio2 = &gpio_b;
 		gpio3 = &gpio_c;
diff --git a/test/dm/test-fdt.c b/test/dm/test-fdt.c
index e1de066226c..f9e81747595 100644
--- a/test/dm/test-fdt.c
+++ b/test/dm/test-fdt.c
@@ -184,7 +184,7 @@ static int dm_test_alias_highest_id(struct unit_test_state *uts)
 	int ret;
 
 	ret = dev_read_alias_highest_id("ethernet");
-	ut_asserteq(5, ret);
+	ut_asserteq(8, ret);
 
 	ret = dev_read_alias_highest_id("gpio");
 	ut_asserteq(3, ret);