obsolete flag removed

diff --git a/tests/README b/tests/README
index abba350..b2966e0 100644
--- a/tests/README
+++ b/tests/README
@@ -21,4 +21,4 @@
 
 Example:
 	07-int-OK.asn1		# Correct ASN.1 file
-	07-int-OK.asn1.-EFN	# Test of file regeneration with -EFN flags.
+	07-int-OK.asn1.-EF	# Test of file regeneration with -E -F flags.