diff --git a/scripts/sanitycheck b/scripts/sanitycheck
index ff96eeb217c..fe709262b97 100755
--- a/scripts/sanitycheck
+++ b/scripts/sanitycheck
@@ -1194,6 +1194,7 @@ class TestInstance:
         @return A SizeCalculator object
         """
         fns = glob.glob(os.path.join(self.outdir, "*.elf"))
+        fns = [x for x in fns if not x.endswith('_prebuilt.elf')]
         if (len(fns) != 1):
             raise BuildError("Missing/multiple output ELF binary")