diff --git a/tools/binman/test/220_fit_subentry_bintool.dts b/tools/binman/test/220_fit_subentry_bintool.dts
new file mode 100644
index 0000000..6e29d41
--- /dev/null
+++ b/tools/binman/test/220_fit_subentry_bintool.dts
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	binman {
+		fit {
+			description = "test-desc";
+			#address-cells = <1>;
+
+			images {
+				test {
+					description = "Something using a bintool";
+					type = "kernel";
+					arch = "arm";
+					os = "linux";
+					compression = "gzip";
+					load = <00000000>;
+					entry = <00000000>;
+
+					gbb {
+						size = <0x2180>;
+					};
+				};
+			};
+
+			configurations {
+				default = "conf-1";
+				conf-1 {
+					description = "Boot bintool output";
+					kernel = "kernel";
+				};
+			};
+		};
+	};
+};