@@ -89,10 +89,20 @@
 {
 	OTAssertEqual(_string.hash, @"täṠ€🤔".hash);
 	OTAssertNotEqual([[self.stringClass stringWithString: @"test"] hash],
 	    @"täṠ€".hash);
 }
+
+- (void)testCopy
+{
+	OTAssertEqualObjects([[_string copy] autorelease], _string);
+}
+
+- (void)testMutableCopy
+{
+	OTAssertEqualObjects([[_string mutableCopy] autorelease], _string);
+}
 
 - (void)testCompare
 {
 	OTAssertEqual([_string compare: @"täṠ€🤔"], OFOrderedSame);
 	OTAssertEqual([[self.stringClass stringWithString: @""]