diff --git a/drivers/of/unittest-data/Makefile b/drivers/of/unittest-data/Makefile
index 6e00a9c69e58..2d135fba94c1 100644
--- a/drivers/of/unittest-data/Makefile
+++ b/drivers/of/unittest-data/Makefile
@@ -1,18 +1,27 @@
 obj-y += testcases.dtb.o
-obj-y += overlay.dtb.o
-obj-y += overlay_bad_phandle.dtb.o
-obj-y += overlay_base.dtb.o
 
 targets += testcases.dtb testcases.dtb.S
+
+ifdef CONFIG_OF_OVERLAY
+
+obj-y += overlay.dtb.o
+obj-y += overlay_bad_phandle.dtb.o
+obj-y += overlay_bad_symbol.dtb.o
+obj-y += overlay_base.dtb.o
+
 targets += overlay.dtb overlay.dtb.S
 targets += overlay_bad_phandle.dtb overlay_bad_phandle.dtb.S
+targets += overlay_bad_symbol.dtb overlay_bad_symbol.dtb.S
 targets += overlay_base.dtb overlay_base.dtb.S
 
-.PRECIOUS: \
-	$(obj)/%.dtb.S \
-	$(obj)/%.dtb
-
 # enable creation of __symbols__ node
 DTC_FLAGS_overlay := -@
 DTC_FLAGS_overlay_bad_phandle := -@
+DTC_FLAGS_overlay_bad_symbol := -@
 DTC_FLAGS_overlay_base := -@
+
+endif
+
+.PRECIOUS: \
+	$(obj)/%.dtb.S \
+	$(obj)/%.dtb
diff --git a/drivers/of/unittest-data/overlay.dts b/drivers/of/unittest-data/overlay.dts
index 6cd7e6a0c13e..60abf5b55cae 100644
--- a/drivers/of/unittest-data/overlay.dts
+++ b/drivers/of/unittest-data/overlay.dts
@@ -25,7 +25,22 @@
 			#size-cells = <1>;
 			status = "ok";
 
-			ride@200 {
+			ride@100 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				track@30 {
+					incline-up = < 48 32 16 >;
+				};
+
+				track@40 {
+					incline-up = < 47 31 15 >;
+				};
+			};
+
+			ride_200: ride@200 {
+				#address-cells = <1>;
+				#size-cells = <1>;
 				compatible = "ot,ferris-wheel";
 				reg = < 0x00000200 0x100 >;
 				hvac-provider = < &hvac_2 >;
@@ -36,6 +51,14 @@
 				spin-rph = < 30 >;
 				gondolas = < 16 >;
 				gondola-capacity = < 6 >;
+
+				ride_200_left: track@10 {
+					reg = < 0x00000010 0x10 >;
+				};
+
+				ride_200_right: track@20 {
+					reg = < 0x00000020 0x10 >;
+				};
 			};
 		};
 	};
diff --git a/drivers/of/unittest-data/overlay_bad_symbol.dts b/drivers/of/unittest-data/overlay_bad_symbol.dts
new file mode 100644
index 000000000000..09261cb9a67e
--- /dev/null
+++ b/drivers/of/unittest-data/overlay_bad_symbol.dts
@@ -0,0 +1,22 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+
+	fragment@0 {
+		target = <&electric_1>;
+
+		__overlay__ {
+
+			// This label should cause an error when the overlay
+			// is applied.  There is already a symbol hvac_1
+			// in the base tree
+			hvac_1: hvac-medium-2 {
+				compatible = "ot,hvac-medium";
+				heat-range = < 50 75 >;
+				cool-range = < 60 80 >;
+			};
+
+		};
+	};
+};
diff --git a/drivers/of/unittest-data/overlay_base.dts b/drivers/of/unittest-data/overlay_base.dts
index 5566b27fb61a..453d0bd83320 100644
--- a/drivers/of/unittest-data/overlay_base.dts
+++ b/drivers/of/unittest-data/overlay_base.dts
@@ -44,6 +44,8 @@
 			orientation = < 127 >;
 
 			ride@100 {
+				#address-cells = <1>;
+				#size-cells = <1>;
 				compatible = "ot,roller-coaster";
 				reg = < 0x00000100 0x100 >;
 				hvac-provider = < &hvac_1 >;
@@ -53,6 +55,15 @@
 				spin-controller = < &spin_ctrl_2 5 &spin_ctrl_2 7 >;
 				spin-controller-names = "track_1", "track_2";
 				queues = < 2 >;
+
+				track@30 {
+					reg = < 0x00000030 0x10 >;
+				};
+
+				track@40 {
+					reg = < 0x00000040 0x10 >;
+				};
+
 			};
 		};
 
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 0959e8cc8814..29a35cb1da64 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1994,6 +1994,8 @@ out:
 static inline void __init of_unittest_overlay(void) { }
 #endif
 
+#ifdef CONFIG_OF_OVERLAY
+
 /*
  * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
  * in scripts/Makefile.lib
@@ -2021,14 +2023,14 @@ struct overlay_info {
 OVERLAY_INFO_EXTERN(overlay_base);
 OVERLAY_INFO_EXTERN(overlay);
 OVERLAY_INFO_EXTERN(overlay_bad_phandle);
-
-#ifdef CONFIG_OF_OVERLAY
+OVERLAY_INFO_EXTERN(overlay_bad_symbol);
 
 /* order of entries is hard-coded into users of overlays[] */
 static struct overlay_info overlays[] = {
 	OVERLAY_INFO(overlay_base, -9999),
 	OVERLAY_INFO(overlay, 0),
 	OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
+	OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
 	{}
 };
 
@@ -2300,6 +2302,10 @@ static __init void of_unittest_overlay_high_level(void)
 
 	unittest(overlay_data_add(2),
 		 "Adding overlay 'overlay_bad_phandle' failed\n");
+
+	unittest(overlay_data_add(3),
+		 "Adding overlay 'overlay_bad_symbol' failed\n");
+
 	return;
 
 err_unlock: