diff --git a/tests/55-components-of-OK.asn1.-EF b/tests/55-components-of-OK.asn1.-EF
index b7b227f..fb2f76d 100644
--- a/tests/55-components-of-OK.asn1.-EF
+++ b/tests/55-components-of-OK.asn1.-EF
@@ -5,7 +5,7 @@
 
 OneType ::= SEQUENCE {
     one-1	 INTEGER,
-    one-2	 [1] EXPLICIT BOOLEAN,
+    one-2	 [1] IMPLICIT BOOLEAN,
     one-3	 SEQUENCE {
         alpha	 [0] IMPLICIT INTEGER,    
         beta	 [1] IMPLICIT INTEGER,