Based on https://src.fedoraproject.org/rpms/sbsigntools/c/bd31748bedce0f3c8ff3b62edcd1171a26c68a9d?branch=rawhide
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -18,7 +18,7 @@ if TEST_BINARY_FORMAT
 EFILDFLAGS = --defsym=EFI_SUBSYSTEM=0x0a
 FORMAT = -O binary
 else
-FORMAT = --target=efi-app-$(EFI_ARCH)
+FORMAT = --output-target=efi-app-$(EFI_ARCH)
 endif
 check_DATA = $(test_key) $(test_cert)
 check_SCRIPTS = test-wrapper.sh