@@ -200,12 +200,12 @@ def test_simple_compress_bad_args(self):
200200        self .assertRaises (TypeError , ZstdCompressor , zstd_dict = {1 : 2 , 3 : 4 })
201201
202202        # valid range for compression level is [-(1<<17), 22] 
203-         msg  =  r'illegal compression level {}; the valid range is \[\d+, \d+\]' 
203+         msg  =  r'illegal compression level {}; the valid range is \[-? \d+, -? \d+\]' 
204204        with  self .assertRaisesRegex (ValueError , msg .format (C_INT_MAX )):
205205            ZstdCompressor (C_INT_MAX )
206206        with  self .assertRaisesRegex (ValueError , msg .format (C_INT_MIN )):
207207            ZstdCompressor (C_INT_MIN )
208-         msg  =  r'illegal compression level; the valid range is \[\d+, \d+\]' 
208+         msg  =  r'illegal compression level; the valid range is \[-? \d+, -? \d+\]' 
209209        with  self .assertRaisesRegex (ValueError , msg ):
210210            ZstdCompressor (level = - (2 ** 1000 ))
211211        with  self .assertRaisesRegex (ValueError , msg ):
@@ -305,7 +305,7 @@ def test_compress_parameters(self):
305305        with  self .assertRaisesRegex (
306306            ValueError ,
307307            "compression parameter 'window_log' received an illegal value 100; " 
308-             r'the valid range is \[\d+, \d+\]' ,
308+             r'the valid range is \[-? \d+, -? \d+\]' ,
309309        ):
310310            compress (b'' , options = option )
311311
@@ -459,7 +459,7 @@ def test_decompress_parameters(self):
459459        with  self .assertRaisesRegex (
460460            ValueError ,
461461            "decompression parameter 'window_log_max' received an illegal value 100; " 
462-             r'the valid range is \[\d+, \d+\]' ,
462+             r'the valid range is \[-? \d+, -? \d+\]' ,
463463        ):
464464            decompress (b'' , options = options )
465465
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