t.Run(tt.name, func(t *testing.T) {
			for _, test := range tt.golden {
				h := tt.newHash()
				h2 := tt.newHash()

				io.WriteString(h, test.in[:len(test.in)/2])

				state, err := h.(encoding.BinaryMarshaler).MarshalBinary()
				if err != nil {
					t.Errorf("could not marshal: %v", err)
					return
				}

				if string(state) != test.halfState {