@@ -36,11 +36,11 @@
 
 @implementation TestsAppDelegate (SHA384HashTests)
 - (void)SHA384HashTests
 {
 	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
-	OFSHA384Hash *sha384;
+	OFSHA384Hash *sha384, *copy;
 	OFFile *f = [OFFile fileWithPath: @"testfile.bin"
 				    mode: @"rb"];
 
 	TEST(@"+[cryptoHash]", (sha384 = [OFSHA384Hash cryptoHash]))
 
@@ -51,15 +51,19 @@
 		[sha384 updateWithBuffer: buf
 				  length: len];
 	}
 	[f close];
 
-	TEST(@"-[digest]", !memcmp([sha384 digest], testfile_sha384, 48))
+	TEST(@"-[copy]", (copy = [[sha384 copy] autorelease]))
+
+	TEST(@"-[digest]",
+	    memcmp([sha384 digest], testfile_sha384, 48) == 0 &&
+	    memcmp([copy digest], testfile_sha384, 48) == 0)
 
 	EXPECT_EXCEPTION(@"Detect invalid call of "
 	    @"-[updateWithBuffer:length:]", OFHashAlreadyCalculatedException,
 	    [sha384 updateWithBuffer: ""
 			      length: 1])
 
 	[pool drain];
 }
 @end