1 files changed, 10 insertions, 0 deletions
diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py
index f893050e706..330e8e1ccb4 100644
--- a/tools/binman/ftest.py
+++ b/tools/binman/ftest.py
@@ -6178,6 +6178,16 @@ fdt         fdtmap                Extract the devicetree blob from the fdtmap
             "Node '/binman/fit/images/@tee-SEQ/tee-os': Invalid OP-TEE file: size mismatch (expected 0x4, have 0xe)",
             str(exc.exception))
 
+    def testExtblobOptional(self):
+        """Test an image with an external blob that is optional"""
+        with test_util.capture_sys_output() as (stdout, stderr):
+            data = self._DoReadFile('266_blob_ext_opt.dts')
+        self.assertEqual(REFCODE_DATA, data)
+        err = stderr.getvalue()
+        self.assertRegex(
+            err,
+            "Image '.*' is missing external blobs but is still functional: missing")
+
 
 if __name__ == "__main__":
     unittest.main()