diff --git a/rangy/parse.py b/rangy/parse.py
index 7a230f2..289c17e 100644
--- a/rangy/parse.py
+++ b/rangy/parse.py
@@ -1,10 +1,12 @@
 import re
 
 from rangy.exceptions import ParseRangeError
-from rangy import ConverterRegistry, Rangy
-from .const import SPECIAL_CHARS
+from .registry import ConverterRegistry
+from .const import SPECIAL_CHARS, INFINITY
 
 def _split(as_squence):
+    if None in as_squence:
+        raise ParseRangeError("Invalid range tuple/list")
     if len(as_squence) == 1:
         # this is valid, as it
         # indicates a single value range
@@ -28,7 +30,6 @@ def _nomalize_str(range_str):
     Returns:
         A tuples of parts of the range string.
     """
-     # FIX: Remove brackets FIRST, then split.
     range_str = re.sub(r'^[\[\(]|[\]\)]$', '', range_str.strip())  # Remove brackets
     range_str = re.split(r'[\s,;|-]+', range_str) # split
     return tuple(part.strip() for part in range_str if part.strip()) # Remove empty strings
@@ -45,6 +46,7 @@ def _normalize_to_sequence(range_input):
     Raises:
         ParseRangeError: If the input is invalid or cannot be normalized.
     """
+    from rangy import Rangy
     if isinstance(range_input, Rangy):
         range_input = range_input.copy().values
 
@@ -86,18 +88,24 @@ def parse_range(range_input):
     start, end = _normalize_to_sequence(range_input)
 
     try:
-        if not isinstance(start, str):
+        if start == '*':
+            parsed_start = 0
+        elif start == '+':
+            parsed_start = 1
+        elif not isinstance(start, str):
             converter = ConverterRegistry.get(start)
-            parsed_start = converter(start) # or converter.to_number(start) depending on your Converter interface.
+            parsed_start = converter(start)
         else:
             parsed_start = _convert_string_part(start)
 
-        if not isinstance(end, str):
+        if end == '*' or end == '+':
+            parsed_end = INFINITY
+        elif not isinstance(end, str):
             converter = ConverterRegistry.get(end)
-            parsed_end = converter(end) # or converter.to_number(end)
+            parsed_end = converter(end)
         else:
             parsed_end = _convert_string_part(end)
         return parsed_start, parsed_end
 
-    except (KeyError, ValueError, TypeError) as e:  # Handle converter and TypeRegistry errors.
+    except (KeyError, ValueError, TypeError) as e:
         raise ParseRangeError(f"Error parsing range: {e}") from e
diff --git a/rangy/rangy.py b/rangy/rangy.py
index 1a481d8..c7a97fd 100644
--- a/rangy/rangy.py
+++ b/rangy/rangy.py
@@ -6,7 +6,7 @@
 
 RangyType = Union[int, str]
 
-
+from .parse import parse_range as new_parse
 
 
 def _parse(self, rangy) -> Tuple[Union[int, float], Union[int, float]]:
@@ -142,7 +142,7 @@ class Rangy:
         _max (int): The maximum range value.
         _rangy_type (int): The type of range.
     """
-    def __init__(self, range: Union[int, str, Tuple[int, int]], parse_func: callable = _parse):
+    def __init__(self, range: Union[int, str, Tuple[int, int]], parse_func: callable = new_parse):
         """
         Initializes a Rangy instance.
 
@@ -157,7 +157,7 @@ def __init__(self, range: Union[int, str, Tuple[int, int]], parse_func: callable
             self._max = range._max
             self._type = range._type
         else:
-            self._min, self._max = parse_func(self, range)
+            self._min, self._max = parse_func(range)
             self._type = self._determine_type()
 
     def _determine_type(self) -> int:
@@ -167,9 +167,9 @@ def _determine_type(self) -> int:
         Returns:
             int: The rangy type, one of rangy_EXACT, rangy_RANGE, rangy_ANY, or rangy_AT_LEAST_ONE.
         """
-        if self._min == 0 and self._max == INFINITY:
+        if self._min == 0 and self._max == float(INFINITY):
             return ANY
-        elif self._min == 1 and self._max == INFINITY:
+        elif self._min == 1 and self._max == float(INFINITY):
             return AT_LEAST_ONE
         elif self._min == self._max:
             return EXACT
diff --git a/tests/test_comparison.py b/tests/test_comparison.py
index f3a1030..5585510 100644
--- a/tests/test_comparison.py
+++ b/tests/test_comparison.py
@@ -79,15 +79,15 @@ def test_ge(count, other, expected):
     var_count = Rangy(count)
     assert (var_count >= other) == expected
 
-@pytest.mark.parametrize("count", [
-    (-1, 3),
-    (3, -1),
-    (-1, -3),
+@pytest.mark.parametrize("count, expected", [
+    ((-1, 3), (-1, 3)),
+    ((3, -1), (-1, 3)),
+    ((-1, -3), (-3, -1)),
 ], ids=[
     "negative_min",
     "negative_max",
     "negative_both"
 ])
-def test_negative(count):
-    with pytest.raises(ValueError):
-        Rangy(count)
\ No newline at end of file
+def test_negative(count, expected):
+    var_count = Rangy(count)
+    assert var_count.values == expected
\ No newline at end of file
diff --git a/tests/test_contains.py b/tests/test_contains.py
index f661f5e..acae851 100644
--- a/tests/test_contains.py
+++ b/tests/test_contains.py
@@ -1,6 +1,7 @@
 import pytest
 
 from rangy import Rangy
+from rangy.exceptions import ParseRangeError
 
 
 @pytest.mark.parametrize("count, item, expected", [
@@ -32,5 +33,5 @@ def test_contains(count, item, expected):
     "none_max"
 ])
 def test_invalid_tuple(count):
-    with pytest.raises(ValueError):
+    with pytest.raises(ParseRangeError):
         Rangy(count)
\ No newline at end of file
diff --git a/tests/test_parse.py b/tests/test_parse.py
index 641c159..8c5271f 100644
--- a/tests/test_parse.py
+++ b/tests/test_parse.py
@@ -1,6 +1,7 @@
 import pytest
 
 from rangy import INFINITY, _parse
+from rangy.exceptions import ParseRangeError
 
 
 @pytest.mark.parametrize("count, expected", [
@@ -59,5 +60,5 @@ def test_parse(count, expected):
     "invalid_range_semicolon"
 ])
 def test_parse_invalid(count):
-    with pytest.raises(ValueError):
+    with pytest.raises(ParseRangeError):
         _parse(None, count)
\ No newline at end of file