diff --git a/drivers/of/unittest-data/overlay_base.dts b/drivers/of/unittest-data/overlay_base.dts
index 99ab9d12d00b..ab9014589c5d 100644
--- a/drivers/of/unittest-data/overlay_base.dts
+++ b/drivers/of/unittest-data/overlay_base.dts
@@ -2,92 +2,4 @@
 /dts-v1/;
 /plugin/;
 
-/*
- * Base device tree that overlays will be applied against.
- *
- * Do not add any properties in node "/".
- * Do not add any nodes other than "/testcase-data-2" in node "/".
- * Do not add anything that would result in dtc creating node "/__fixups__".
- * dtc will create nodes "/__symbols__" and "/__local_fixups__".
- */
-
-/ {
-	testcase-data-2 {
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		electric_1: substation@100 {
-			compatible = "ot,big-volts-control";
-			reg = < 0x00000100 0x100 >;
-			status = "disabled";
-
-			hvac_1: hvac-medium-1 {
-				compatible = "ot,hvac-medium";
-				heat-range = < 50 75 >;
-				cool-range = < 60 80 >;
-			};
-
-			spin_ctrl_1: motor-1 {
-				compatible = "ot,ferris-wheel-motor";
-				spin = "clockwise";
-				rpm_avail = < 50 >;
-			};
-
-			spin_ctrl_2: motor-8 {
-				compatible = "ot,roller-coaster-motor";
-			};
-		};
-
-		rides_1: fairway-1 {
-			#address-cells = <1>;
-			#size-cells = <1>;
-			compatible = "ot,rides";
-			status = "disabled";
-			orientation = < 127 >;
-
-			ride@100 {
-				#address-cells = <1>;
-				#size-cells = <1>;
-				compatible = "ot,roller-coaster";
-				reg = < 0x00000100 0x100 >;
-				hvac-provider = < &hvac_1 >;
-				hvac-thermostat = < 29 > ;
-				hvac-zones = < 14 >;
-				hvac-zone-names = "operator";
-				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 >;
-				};
-
-			};
-		};
-
-		lights_1: lights@30000 {
-			compatible = "ot,work-lights";
-			reg = < 0x00030000 0x1000 >;
-			status = "disabled";
-		};
-
-		lights_2: lights@40000 {
-			compatible = "ot,show-lights";
-			reg = < 0x00040000 0x1000 >;
-			status = "disabled";
-			rate = < 13 138 >;
-		};
-
-		retail_1: vending@50000 {
-			reg = < 0x00050000 0x1000 >;
-			compatible = "ot,tickets";
-			status = "disabled";
-		};
-
-	};
-};
-
+#include "overlay_common.dtsi"
diff --git a/drivers/of/unittest-data/overlay_common.dtsi b/drivers/of/unittest-data/overlay_common.dtsi
new file mode 100644
index 000000000000..08874a72556e
--- /dev/null
+++ b/drivers/of/unittest-data/overlay_common.dtsi
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Base device tree that overlays will be applied against.
+ *
+ * Do not add any properties in node "/".
+ * Do not add any nodes other than "/testcase-data-2" in node "/".
+ * Do not add anything that would result in dtc creating node "/__fixups__".
+ * dtc will create nodes "/__symbols__" and "/__local_fixups__".
+ */
+
+/ {
+	testcase-data-2 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		electric_1: substation@100 {
+			compatible = "ot,big-volts-control";
+			reg = < 0x00000100 0x100 >;
+			status = "disabled";
+
+			hvac_1: hvac-medium-1 {
+				compatible = "ot,hvac-medium";
+				heat-range = < 50 75 >;
+				cool-range = < 60 80 >;
+			};
+
+			spin_ctrl_1: motor-1 {
+				compatible = "ot,ferris-wheel-motor";
+				spin = "clockwise";
+				rpm_avail = < 50 >;
+			};
+
+			spin_ctrl_2: motor-8 {
+				compatible = "ot,roller-coaster-motor";
+			};
+		};
+
+		rides_1: fairway-1 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "ot,rides";
+			status = "disabled";
+			orientation = < 127 >;
+
+			ride@100 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+				compatible = "ot,roller-coaster";
+				reg = < 0x00000100 0x100 >;
+				hvac-provider = < &hvac_1 >;
+				hvac-thermostat = < 29 > ;
+				hvac-zones = < 14 >;
+				hvac-zone-names = "operator";
+				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 >;
+				};
+
+			};
+		};
+
+		lights_1: lights@30000 {
+			compatible = "ot,work-lights";
+			reg = < 0x00030000 0x1000 >;
+			status = "disabled";
+		};
+
+		lights_2: lights@40000 {
+			compatible = "ot,show-lights";
+			reg = < 0x00040000 0x1000 >;
+			status = "disabled";
+			rate = < 13 138 >;
+		};
+
+		retail_1: vending@50000 {
+			reg = < 0x00050000 0x1000 >;
+			compatible = "ot,tickets";
+			status = "disabled";
+		};
+
+	};
+};
+
diff --git a/drivers/of/unittest-data/testcases.dts b/drivers/of/unittest-data/testcases.dts
index a85b5e1c381a..b80d6009ad7a 100644
--- a/drivers/of/unittest-data/testcases.dts
+++ b/drivers/of/unittest-data/testcases.dts
@@ -2,19 +2,20 @@
 /dts-v1/;
 /plugin/;
 
+#include "testcases_common.dtsi"
+
 / {
+        /*
+	 * testcase data that intentionally results in an error is located here
+	 * instead of in testcases_common.dtsi so that the static overlay apply
+	 * tests will not include the error.
+         */
 	testcase-data {
-		changeset {
-			prop-update = "hello";
-			prop-remove = "world";
-			node-remove {
-			};
+		testcase-device2 {
+			compatible = "testcase-device";
+			interrupt-parent = <&test_intc2>;
+			interrupts = <1>; /* invalid specifier - too short */
 		};
 	};
+
 };
-#include "tests-phandle.dtsi"
-#include "tests-interrupts.dtsi"
-#include "tests-match.dtsi"
-#include "tests-address.dtsi"
-#include "tests-platform.dtsi"
-#include "tests-overlay.dtsi"
diff --git a/drivers/of/unittest-data/testcases_common.dtsi b/drivers/of/unittest-data/testcases_common.dtsi
new file mode 100644
index 000000000000..19292bbb4cbb
--- /dev/null
+++ b/drivers/of/unittest-data/testcases_common.dtsi
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/ {
+	testcase-data {
+		changeset {
+			prop-update = "hello";
+			prop-remove = "world";
+			node-remove {
+			};
+		};
+	};
+};
+
+#include "tests-phandle.dtsi"
+#include "tests-interrupts.dtsi"
+#include "tests-match.dtsi"
+#include "tests-address.dtsi"
+#include "tests-platform.dtsi"
+#include "tests-overlay.dtsi"
diff --git a/drivers/of/unittest-data/tests-interrupts.dtsi b/drivers/of/unittest-data/tests-interrupts.dtsi
index ec175e800725..6c58fd61585c 100644
--- a/drivers/of/unittest-data/tests-interrupts.dtsi
+++ b/drivers/of/unittest-data/tests-interrupts.dtsi
@@ -62,11 +62,10 @@ testcase-device1 {
 			interrupts = <1>;
 		};
 
-		testcase-device2 {
-			compatible = "testcase-device";
-			interrupt-parent = <&test_intc2>;
-			interrupts = <1>; /* invalid specifier - too short */
-		};
+		/*
+		 * testcase data that intentionally results in an error is
+		 * located in testcases.dts instead of in this file so that the
+		 * static overlay apply tests will not include the error.
+                 */
 	};
-
 };
