     firstMatchTest(#"can\B\'\Bt"#, input: "I can't do that.", match: "can't")
     firstMatchTest(#"\b÷\b"#, input: "3 ÷ 3 = 1", match: "÷")
   }
+#endif
   
   func testMatchGroups() {
     // MARK: Groups

      ("aeiou", true),
      ("åe\u{301}ïôú", false))

    matchTest(
      #"abcd\b.+"#,
      ("abcd ef", true),

      ("pass me the the kettle", ["the"]),
      ("this doesn't have any", nil)
    )
#endif

    // Floats
    flatCaptureTest(
