diff --git a/src/univers/version_range.py b/src/univers/version_range.py
index e1863c32..0e0b1f43 100644
--- a/src/univers/version_range.py
+++ b/src/univers/version_range.py
@@ -233,6 +233,7 @@ class NpmVersionRange(VersionRange):
         ">=": ">=",
         "<": "<",
         ">": ">",
+        "=": "=",  # This is not a native node-semver comparator, but is used in the gitlab version range for npm packages.
     }
 
     @classmethod
@@ -974,6 +975,51 @@ def from_native(cls, string):
         return cls(constraints=constraints)
 
 
+class GitLabVersionRange(VersionRange):
+    @classmethod
+    def from_gitlab_native(cls, scheme, string):
+        vrc = RANGE_CLASS_BY_SCHEMES[scheme]
+        constraint_items = []
+        constraints = []
+        split = " "
+        if scheme == "pypi":
+            split = ","
+        pipe_separated_constraints = string.split("||")
+        for pipe_separated_constraint in pipe_separated_constraints:
+            space_seperated_constraints = pipe_separated_constraint.split(split)
+            constraint_items.extend(space_seperated_constraints)
+        comparator = ""
+        # A constraint item can be a comparator or a version or a version with comparator
+        # If it's empty continue
+        # If it's in `vers_by_native_comparators`, append it with the comparator and continue
+        # If it's a version, make version constraint from the version and use the comparator from the previous item and make comparator empty
+        # If it's a version with comparator, use split_req to get version and comparator to form constraint and make comparator empty
+        for constraint_item in constraint_items:
+            if not constraint_item:
+                continue
+            if "".join([comparator, constraint_item]) in vrc.vers_by_native_comparators:
+                comparator = "".join([comparator, constraint_item])
+                comparator = vrc.vers_by_native_comparators[comparator]
+                continue
+            if comparator:
+                constraints.append(
+                    VersionConstraint(
+                        comparator=comparator, version=vrc.version_class(constraint_item)
+                    )
+                )
+            else:
+                comparator, version_constraint = split_req(
+                    constraint_item, vrc.vers_by_native_comparators
+                )
+                constraints.append(
+                    VersionConstraint(
+                        comparator=comparator, version=vrc.version_class(version_constraint)
+                    )
+                )
+            comparator = ""
+        return vrc(constraints=constraints)
+
+
 vers_by_github_native_comparators = {
     "=": "=",
     "!=": "!=",
diff --git a/tests/data/gem_gitlab.json b/tests/data/gem_gitlab.json
new file mode 100644
index 00000000..7a8da243
--- /dev/null
+++ b/tests/data/gem_gitlab.json
@@ -0,0 +1,1904 @@
+[
+  {
+    "test_index": 1,
+    "scheme": "gem",
+    "gitlab_native": "<3.4.1||>=4.3.0 <4.3.1",
+    "expected_vers": "vers:gem/<3.4.1|>=4.3.0|<4.3.1"
+  },
+  {
+    "test_index": 2,
+    "scheme": "gem",
+    "gitlab_native": ">=4.0.0 <4.1.2",
+    "expected_vers": "vers:gem/>=4.0.0|<4.1.2"
+  },
+  {
+    "test_index": 3,
+    "scheme": "gem",
+    "gitlab_native": "<3.4.0||>=4.0.0 <4.1.2",
+    "expected_vers": "vers:gem/<3.4.0|>=4.0.0|<4.1.2"
+  },
+  {
+    "test_index": 4,
+    "scheme": "gem",
+    "gitlab_native": "<3.4.0||>=4.0.0 <4.1.2",
+    "expected_vers": "vers:gem/<3.4.0|>=4.0.0|<4.1.2"
+  },
+  {
+    "test_index": 5,
+    "scheme": "gem",
+    "gitlab_native": ">=1.0.0-alpha0 <1.1.1",
+    "expected_vers": "vers:gem/>=1.0.0-alpha0|<1.1.1"
+  },
+  {
+    "test_index": 6,
+    "scheme": "gem",
+    "gitlab_native": "<1.4.3||>=2.0.0 <2.0.2",
+    "expected_vers": "vers:gem/<1.4.3|>=2.0.0|<2.0.2"
+  },
+  {
+    "test_index": 7,
+    "scheme": "gem",
+    "gitlab_native": "<=3.6.2||>=3.7.0 <=3.7.3||>=3.8.0 <=3.8.3",
+    "expected_vers": "vers:gem/<=3.6.2|>=3.7.0|<=3.7.3|>=3.8.0|<=3.8.3"
+  },
+  {
+    "test_index": 8,
+    "scheme": "gem",
+    "gitlab_native": ">=1.10.0a <1.10.1||>=1.11.0a <1.11.2||>=1.12.0a <1.12.0",
+    "expected_vers": "vers:gem/>=1.10.0a|<1.10.1|>=1.11.0a|<1.11.2|>=1.12.0a|<1.12.0"
+  },
+  {
+    "test_index": 9,
+    "scheme": "gem",
+    "gitlab_native": "<1.0.1||>=1.1.0.alpha0 <1.1.2||>=1.2.0.alpha0 <1.2.1.1||>=1.3.0.alpha0 <1.3.1",
+    "expected_vers": "vers:gem/<1.0.1|>=1.1.0.alpha0|<1.1.2|>=1.2.0.alpha0|<1.2.1.1|>=1.3.0.alpha0|<1.3.1"
+  },
+  {
+    "test_index": 10,
+    "scheme": "gem",
+    "gitlab_native": "<1.0.1||>=1.1.0 <1.1.2",
+    "expected_vers": "vers:gem/<1.0.1|>=1.1.0|<1.1.2"
+  },
+  {
+    "test_index": 11,
+    "scheme": "gem",
+    "gitlab_native": ">=1.2.0.alpha0 <1.2.2||>=1.3.0.alpha0 <1.3.2",
+    "expected_vers": "vers:gem/>=1.2.0.alpha0|<1.2.2|>=1.3.0.alpha0|<1.3.2"
+  },
+  {
+    "test_index": 12,
+    "scheme": "gem",
+    "gitlab_native": ">=1.11.0a <1.11.4||>=1.12.0a <1.12.2||>=1.13.0a <1.13.12||>=2.0.0a <2.0.3||>=2.1.0a <2.1.2||>=2.2.0a <2.2.1",
+    "expected_vers": "vers:gem/>=1.11.0a|<1.11.4|>=1.12.0a|<1.12.2|>=1.13.0a|<1.13.12|>=2.0.0a|<2.0.3|>=2.1.0a|<2.1.2|>=2.2.0a|<2.2.1"
+  },
+  {
+    "test_index": 13,
+    "scheme": "gem",
+    "gitlab_native": ">=1.0.13 <=1.0.14||=0.1.4",
+    "expected_vers": "vers:gem/0.1.4|>=1.0.13|<=1.0.14"
+  },
+  {
+    "test_index": 14,
+    "scheme": "gem",
+    "gitlab_native": ">=0.7.0 <0.9.13",
+    "expected_vers": "vers:gem/>=0.7.0|<0.9.13"
+  },
+  {
+    "test_index": 15,
+    "scheme": "gem",
+    "gitlab_native": ">=0.3.0 <0.3.1||>=0.2.0 <0.2.1||<0.1.1",
+    "expected_vers": "vers:gem/<0.1.1|>=0.2.0|<0.2.1|>=0.3.0|<0.3.1"
+  },
+  {
+    "test_index": 16,
+    "scheme": "gem",
+    "gitlab_native": "<=0.1.0||>0.2.0 <0.3.1",
+    "expected_vers": "vers:gem/<=0.1.0|>0.2.0|<0.3.1"
+  },
+  {
+    "test_index": 17,
+    "scheme": "gem",
+    "gitlab_native": ">=0.1.0 <=0.3.0",
+    "expected_vers": "vers:gem/>=0.1.0|<=0.3.0"
+  },
+  {
+    "test_index": 18,
+    "scheme": "gem",
+    "gitlab_native": ">=1.2.6 <1.2.8",
+    "expected_vers": "vers:gem/>=1.2.6|<1.2.8"
+  },
+  {
+    "test_index": 19,
+    "scheme": "gem",
+    "gitlab_native": ">=1.0.0 <1.1.4",
+    "expected_vers": "vers:gem/>=1.0.0|<1.1.4"
+  },
+  {
+    "test_index": 20,
+    "scheme": "gem",
+    "gitlab_native": "<1.12.3||>2.0.0a <3.0.4",
+    "expected_vers": "vers:gem/<1.12.3|>2.0.0a|<3.0.4"
+  },
+  {
+    "test_index": 21,
+    "scheme": "gem",
+    "gitlab_native": ">=1.16.0 <2.2.16",
+    "expected_vers": "vers:gem/>=1.16.0|<2.2.16"
+  },
+  {
+    "test_index": 22,
+    "scheme": "gem",
+    "gitlab_native": ">=5.0.0 <5.0.3||>=5.1.0 <5.1.1||>=5.2.0 <5.2.5||>=5.3.0 <5.3.2",
+    "expected_vers": "vers:gem/>=5.0.0|<5.0.3|>=5.1.0|<5.1.1|>=5.2.0|<5.2.5|>=5.3.0|<5.3.2"
+  },
+  {
+    "test_index": 23,
+    "scheme": "gem",
+    "gitlab_native": ">=2.1.0 <4.2.6",
+    "expected_vers": "vers:gem/>=2.1.0|<4.2.6"
+  },
+  {
+    "test_index": 24,
+    "scheme": "gem",
+    "gitlab_native": "<1.4.1||>2.0.0a <2.0.0rc3",
+    "expected_vers": "vers:gem/<1.4.1|>2.0.0a|<2.0.0rc3"
+  },
+  {
+    "test_index": 25,
+    "scheme": "gem",
+    "gitlab_native": ">2.0.0a <2.1.2||<1.4.2",
+    "expected_vers": "vers:gem/<1.4.2|>2.0.0a|<2.1.2"
+  },
+  {
+    "test_index": 26,
+    "scheme": "gem",
+    "gitlab_native": ">=1.19 <1.22",
+    "expected_vers": "vers:gem/>=1.19|<1.22"
+  },
+  {
+    "test_index": 27,
+    "scheme": "gem",
+    "gitlab_native": ">=1.0.0 <2.5.4",
+    "expected_vers": "vers:gem/>=1.0.0|<2.5.4"
+  },
+  {
+    "test_index": 28,
+    "scheme": "gem",
+    "gitlab_native": ">=0.14.0 <=0.14.1",
+    "expected_vers": "vers:gem/>=0.14.0|<=0.14.1"
+  },
+  {
+    "test_index": 29,
+    "scheme": "gem",
+    "gitlab_native": ">=0.12.0 <=0.14.1",
+    "expected_vers": "vers:gem/>=0.12.0|<=0.14.1"
+  },
+  {
+    "test_index": 30,
+    "scheme": "gem",
+    "gitlab_native": ">=2.3.0 <2.4.1",
+    "expected_vers": "vers:gem/>=2.3.0|<2.4.1"
+  },
+  {
+    "test_index": 31,
+    "scheme": "gem",
+    "gitlab_native": "<=5.1.3||>=6.0.0 <=6.2.0",
+    "expected_vers": "vers:gem/<=5.1.3|>=6.0.0|<=6.2.0"
+  },
+  {
+    "test_index": 32,
+    "scheme": "gem",
+    "gitlab_native": "<5.2.10||>=6.0.0 <6.4.0",
+    "expected_vers": "vers:gem/<5.2.10|>=6.0.0|<6.4.0"
+  },
+  {
+    "test_index": 33,
+    "scheme": "gem",
+    "gitlab_native": "<1.3.2||>=2.0.1 <2.1.1",
+    "expected_vers": "vers:gem/<1.3.2|>=2.0.1|<2.1.1"
+  },
+  {
+    "test_index": 34,
+    "scheme": "gem",
+    "gitlab_native": "<1.3.2||>=2.0.1 <2.1.1",
+    "expected_vers": "vers:gem/<1.3.2|>=2.0.1|<2.1.1"
+  },
+  {
+    "test_index": 35,
+    "scheme": "gem",
+    "gitlab_native": ">=3.0.0a <3.0.0.beta.3||>=2.12.0a <2.12.3||>=2.11.0a <2.11.3||>=2.10.0a <2.10.2||>=2.9.0a <2.9.4||>=2.8.0a <2.8.3||>=2.7.0a <2.7.1||>=2.5.0a <2.5.1||>=2.4.0a <2.4.6||>=2.3.0a <2.3.3||>=2.2.0a <2.2.3||>=2.1.0a <2.1.4||>=2.0.0 <2.0.5",
+    "expected_vers": "vers:gem/>=2.0.0|<2.0.5|>=2.1.0a|<2.1.4|>=2.2.0a|<2.2.3|>=2.3.0a|<2.3.3|>=2.4.0a|<2.4.6|>=2.5.0a|<2.5.1|>=2.7.0a|<2.7.1|>=2.8.0a|<2.8.3|>=2.9.0a|<2.9.4|>=2.10.0a|<2.10.2|>=2.11.0a|<2.11.3|>=2.12.0a|<2.12.3|>=3.0.0a|<3.0.0.beta.3"
+  },
+  {
+    "test_index": 36,
+    "scheme": "gem",
+    "gitlab_native": ">=2.0.0 <=2.12.4||>=3.0.0 <=4.0.0.beta7",
+    "expected_vers": "vers:gem/>=2.0.0|<=2.12.4|>=3.0.0|<=4.0.0.beta7"
+  },
+  {
+    "test_index": 37,
+    "scheme": "gem",
+    "gitlab_native": "<2.8.6||>=2.9.0 <2.9.6||>=2.10.0 <2.10.2",
+    "expected_vers": "vers:gem/<2.8.6|>=2.9.0|<2.9.6|>=2.10.0|<2.10.2"
+  },
+  {
+    "test_index": 38,
+    "scheme": "gem",
+    "gitlab_native": "<2.11.14||>=3.0.0 <3.0.5||>=3.1.0 <3.1.5",
+    "expected_vers": "vers:gem/<2.11.14|>=3.0.0|<3.0.5|>=3.1.0|<3.1.5"
+  },
+  {
+    "test_index": 39,
+    "scheme": "gem",
+    "gitlab_native": ">=0.12.29 <=0.12.40",
+    "expected_vers": "vers:gem/>=0.12.29|<=0.12.40"
+  },
+  {
+    "test_index": 40,
+    "scheme": "gem",
+    "gitlab_native": ">=0.14.14 <=1.14.1",
+    "expected_vers": "vers:gem/>=0.14.14|<=1.14.1"
+  },
+  {
+    "test_index": 41,
+    "scheme": "gem",
+    "gitlab_native": ">=5.0.0.alpha <5.0.0.beta1.1||>=4.2.0.alpha <4.2.5.1||>=4.1.0.alpha <4.1.14.1",
+    "expected_vers": "vers:gem/>=4.1.0.alpha|<4.1.14.1|>=4.2.0.alpha|<4.2.5.1|>=5.0.0.alpha|<5.0.0.beta1.1"
+  },
+  {
+    "test_index": 42,
+    "scheme": "gem",
+    "gitlab_native": ">=3.0.0 <3.1.11 || >=3.2.0 <3.2.12",
+    "expected_vers": "vers:gem/>=3.0.0|<3.1.11|>=3.2.0|<3.2.12"
+  },
+  {
+    "test_index": 43,
+    "scheme": "gem",
+    "gitlab_native": ">0.5.0 <1.0.4||>=1.1.0 <1.1.3||>=1.2.0 <1.2.5",
+    "expected_vers": "vers:gem/>0.5.0|<1.0.4|>=1.1.0|<1.1.3|>=1.2.0|<1.2.5"
+  },
+  {
+    "test_index": 44,
+    "scheme": "gem",
+    "gitlab_native": ">=3.0.0 <5.2.1",
+    "expected_vers": "vers:gem/>=3.0.0|<5.2.1"
+  },
+  {
+    "test_index": 45,
+    "scheme": "gem",
+    "gitlab_native": ">=1.1.0 <4.6.3",
+    "expected_vers": "vers:gem/>=1.1.0|<4.6.3"
+  },
+  {
+    "test_index": 46,
+    "scheme": "gem",
+    "gitlab_native": "<2.2.10||>=2.3.0a <2.3.8||>=3.0.0a <3.0.0.rc4||>=2.4.0a <2.4.5",
+    "expected_vers": "vers:gem/<2.2.10|>=2.3.0a|<2.3.8|>=2.4.0a|<2.4.5|>=3.0.0a|<3.0.0.rc4"
+  },
+  {
+    "test_index": 47,
+    "scheme": "gem",
+    "gitlab_native": ">=1.0.0.rc1 <=1.3.2",
+    "expected_vers": "vers:gem/>=1.0.0.rc1|<=1.3.2"
+  },
+  {
+    "test_index": 48,
+    "scheme": "gem",
+    "gitlab_native": "<3.7.11||>=4.0.0 <4.0.4||>=4.1.0 <4.1.11",
+    "expected_vers": "vers:gem/<3.7.11|>=4.0.0|<4.0.4|>=4.1.0|<4.1.11"
+  },
+  {
+    "test_index": 49,
+    "scheme": "gem",
+    "gitlab_native": ">=0.11.0 <=0.11.1||=0.30.0",
+    "expected_vers": "vers:gem/>=0.11.0|<=0.11.1|0.30.0"
+  },
+  {
+    "test_index": 50,
+    "scheme": "gem",
+    "gitlab_native": ">=3.7.0 <3.7.13||>=4.0.0 <4.0.5||>=4.1.0 <4.1.12",
+    "expected_vers": "vers:gem/>=3.7.0|<3.7.13|>=4.0.0|<4.0.5|>=4.1.0|<4.1.12"
+  },
+  {
+    "test_index": 51,
+    "scheme": "gem",
+    "gitlab_native": ">2.2.9 <=2.5.0",
+    "expected_vers": "vers:gem/>2.2.9|<=2.5.0"
+  },
+  {
+    "test_index": 52,
+    "scheme": "gem",
+    "gitlab_native": ">=2.6.0 <=3.0.2",
+    "expected_vers": "vers:gem/>=2.6.0|<=3.0.2"
+  },
+  {
+    "test_index": 53,
+    "scheme": "gem",
+    "gitlab_native": ">2.2.9 <=2.5.0",
+    "expected_vers": "vers:gem/>2.2.9|<=2.5.0"
+  },
+  {
+    "test_index": 54,
+    "scheme": "gem",
+    "gitlab_native": ">2.2.9 <=2.5.0",
+    "expected_vers": "vers:gem/>2.2.9|<=2.5.0"
+  },
+  {
+    "test_index": 55,
+    "scheme": "gem",
+    "gitlab_native": ">=2.6.0 <=3.0.2",
+    "expected_vers": "vers:gem/>=2.6.0|<=3.0.2"
+  },
+  {
+    "test_index": 56,
+    "scheme": "gem",
+    "gitlab_native": ">=2.6.0 <=3.0.2",
+    "expected_vers": "vers:gem/>=2.6.0|<=3.0.2"
+  },
+  {
+    "test_index": 57,
+    "scheme": "gem",
+    "gitlab_native": ">=2.0.0 <=2.6.13",
+    "expected_vers": "vers:gem/>=2.0.0|<=2.6.13"
+  },
+  {
+    "test_index": 58,
+    "scheme": "gem",
+    "gitlab_native": ">2.2.9 <=2.5.0",
+    "expected_vers": "vers:gem/>2.2.9|<=2.5.0"
+  },
+  {
+    "test_index": 59,
+    "scheme": "gem",
+    "gitlab_native": ">2.2.9 <=2.5.0",
+    "expected_vers": "vers:gem/>2.2.9|<=2.5.0"
+  },
+  {
+    "test_index": 60,
+    "scheme": "gem",
+    "gitlab_native": ">=2.6.0 <=3.0.2",
+    "expected_vers": "vers:gem/>=2.6.0|<=3.0.2"
+  },
+  {
+    "test_index": 61,
+    "scheme": "gem",
+    "gitlab_native": ">=0.8.11 <=0.9.0",
+    "expected_vers": "vers:gem/>=0.8.11|<=0.9.0"
+  },
+  {
+    "test_index": 62,
+    "scheme": "gem",
+    "gitlab_native": ">=2.6.0 <=3.0.2",
+    "expected_vers": "vers:gem/>=2.6.0|<=3.0.2"
+  },
+  {
+    "test_index": 63,
+    "scheme": "gem",
+    "gitlab_native": ">2.2.9 <=2.5.0",
+    "expected_vers": "vers:gem/>2.2.9|<=2.5.0"
+  },
+  {
+    "test_index": 64,
+    "scheme": "gem",
+    "gitlab_native": ">=2.7.6 <=3.0.2",
+    "expected_vers": "vers:gem/>=2.7.6|<=3.0.2"
+  },
+  {
+    "test_index": 65,
+    "scheme": "gem",
+    "gitlab_native": ">2.2.9 <=2.5.0",
+    "expected_vers": "vers:gem/>2.2.9|<=2.5.0"
+  },
+  {
+    "test_index": 66,
+    "scheme": "gem",
+    "gitlab_native": "<1.5.3||>2.0.0 <2.0.5",
+    "expected_vers": "vers:gem/<1.5.3|>2.0.0|<2.0.5"
+  },
+  {
+    "test_index": 67,
+    "scheme": "gem",
+    "gitlab_native": "<1.5.5 || >=1.6.0 <1.6.8 || >=1.7.0 <1.7.7",
+    "expected_vers": "vers:gem/<1.5.5|>=1.6.0|<1.6.8|>=1.7.0|<1.7.7"
+  },
+  {
+    "test_index": 68,
+    "scheme": "gem",
+    "gitlab_native": ">=2.0.0 <=2.0.1",
+    "expected_vers": "vers:gem/>=2.0.0|<=2.0.1"
+  },
+  {
+    "test_index": 69,
+    "scheme": "gem",
+    "gitlab_native": ">=7.0.0 <7.12.1||<6.25.1",
+    "expected_vers": "vers:gem/<6.25.1|>=7.0.0|<7.12.1"
+  },
+  {
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+    "scheme": "gem",
+    "gitlab_native": ">=3.2.0 <4.0.3",
+    "expected_vers": "vers:gem/>=3.2.0|<4.0.3"
+  },
+  {
+    "test_index": 296,
+    "scheme": "gem",
+    "gitlab_native": ">=2.0.0 <2.3.13||>=3.0.0 <3.0.10",
+    "expected_vers": "vers:gem/>=2.0.0|<2.3.13|>=3.0.0|<3.0.10"
+  },
+  {
+    "test_index": 297,
+    "scheme": "gem",
+    "gitlab_native": ">=3.0.0 <3.0.13||>=3.1.0 <3.1.5||>=3.2.0 <3.2.4",
+    "expected_vers": "vers:gem/>=3.0.0|<3.0.13|>=3.1.0|<3.1.5|>=3.2.0|<3.2.4"
+  },
+  {
+    "test_index": 298,
+    "scheme": "gem",
+    "gitlab_native": ">=4.2.0 <5.2.4.5||>=6.0.0 <6.0.3.5||>=6.1.0 <6.1.2.1",
+    "expected_vers": "vers:gem/>=4.2.0|<5.2.4.5|>=6.0.0|<6.0.3.5|>=6.1.0|<6.1.2.1"
+  },
+  {
+    "test_index": 299,
+    "scheme": "gem",
+    "gitlab_native": ">=3.0.0 <3.0.18||>=3.1.0 <3.1.9||>=3.2.0 <3.2.10",
+    "expected_vers": "vers:gem/>=3.0.0|<3.0.18|>=3.1.0|<3.1.9|>=3.2.0|<3.2.10"
+  },
+  {
+    "test_index": 300,
+    "scheme": "gem",
+    "gitlab_native": ">=4.0.0.alpha <4.2.7.1",
+    "expected_vers": "vers:gem/>=4.0.0.alpha|<4.2.7.1"
+  },
+  {
+    "test_index": 301,
+    "scheme": "gem",
+    "gitlab_native": ">=3.0.0 <3.0.13||>=3.1.0 <3.1.5||>=3.2.0 <3.2.4",
+    "expected_vers": "vers:gem/>=3.0.0|<3.0.13|>=3.1.0|<3.1.5|>=3.2.0|<3.2.4"
+  },
+  {
+    "test_index": 302,
+    "scheme": "gem",
+    "gitlab_native": ">4.0.0 <4.0.7||>4.1.0 <4.1.3",
+    "expected_vers": "vers:gem/>4.0.0|<4.0.7|>4.1.0|<4.1.3"
+  },
+  {
+    "test_index": 303,
+    "scheme": "gem",
+    "gitlab_native": "<2.3.17 || >=2.4.0 <3.1.0",
+    "expected_vers": "vers:gem/<2.3.17|>=2.4.0|<3.1.0"
+  },
+  {
+    "test_index": 304,
+    "scheme": "gem",
+    "gitlab_native": ">=5.0.0.alpha <5.0.0.beta1.1||>=4.2.0.alpha <4.2.5.1||>=4.0.0.alpha <4.1.14.1||>=3.1.0.alpha <3.2.22.1",
+    "expected_vers": "vers:gem/>=3.1.0.alpha|<3.2.22.1|>=4.0.0.alpha|<4.1.14.1|>=4.2.0.alpha|<4.2.5.1|>=5.0.0.alpha|<5.0.0.beta1.1"
+  },
+  {
+    "test_index": 305,
+    "scheme": "gem",
+    "gitlab_native": ">4.0.0 <4.0.9||>4.1.0 <4.1.5",
+    "expected_vers": "vers:gem/>4.0.0|<4.0.9|>4.1.0|<4.1.5"
+  },
+  {
+    "test_index": 306,
+    "scheme": "gem",
+    "gitlab_native": ">2.0.0 <3.2.19",
+    "expected_vers": "vers:gem/>2.0.0|<3.2.19"
+  },
+  {
+    "test_index": 307,
+    "scheme": "gem",
+    "gitlab_native": "<3.0.19 || >=3.1.0 <3.1.10 || >=3.2.0 <3.2.11",
+    "expected_vers": "vers:gem/<3.0.19|>=3.1.0|<3.1.10|>=3.2.0|<3.2.11"
+  },
+  {
+    "test_index": 308,
+    "scheme": "gem",
+    "gitlab_native": ">=3.0.0 <3.0.4",
+    "expected_vers": "vers:gem/>=3.0.0|<3.0.4"
+  },
+  {
+    "test_index": 309,
+    "scheme": "gem",
+    "gitlab_native": "<3.0.14||>=3.1.0 <3.1.6||>=3.2.0 <3.2.6",
+    "expected_vers": "vers:gem/<3.0.14|>=3.1.0|<3.1.6|>=3.2.0|<3.2.6"
+  },
+  {
+    "test_index": 310,
+    "scheme": "gem",
+    "gitlab_native": ">0.0.0a <0.6.4||>0.7.0a <0.7.3",
+    "expected_vers": "vers:gem/>0.0.0a|<0.6.4|>0.7.0a|<0.7.3"
+  },
+  {
+    "test_index": 311,
+    "scheme": "gem",
+    "gitlab_native": ">=1.2 <3.5.0",
+    "expected_vers": "vers:gem/>=1.2|<3.5.0"
+  },
+  {
+    "test_index": 312,
+    "scheme": "gem",
+    "gitlab_native": ">=3.11 <6.3.1",
+    "expected_vers": "vers:gem/>=3.11|<6.3.1"
+  },
+  {
+    "test_index": 313,
+    "scheme": "gem",
+    "gitlab_native": ">=1.0.3 <3.5.0",
+    "expected_vers": "vers:gem/>=1.0.3|<3.5.0"
+  },
+  {
+    "test_index": 314,
+    "scheme": "gem",
+    "gitlab_native": ">=2.3.0 <3.9.5 || >=3.10 <3.12 || >=4.0.0.preview2 <4.0.0.rc.2",
+    "expected_vers": "vers:gem/>=2.3.0|<3.9.5|>=3.10|<3.12|>=4.0.0.preview2|<4.0.0.rc.2"
+  },
+  {
+    "test_index": 315,
+    "scheme": "gem",
+    "gitlab_native": ">=4.2.2 <4.3.6",
+    "expected_vers": "vers:gem/>=4.2.2|<4.3.6"
+  },
+  {
+    "test_index": 316,
+    "scheme": "gem",
+    "gitlab_native": ">=3.1.4 <5.2.0",
+    "expected_vers": "vers:gem/>=3.1.4|<5.2.0"
+  },
+  {
+    "test_index": 317,
+    "scheme": "gem",
+    "gitlab_native": "<0.5.1||>=0.6.0 <0.6.6",
+    "expected_vers": "vers:gem/<0.5.1|>=0.6.0|<0.6.6"
+  }
+]
\ No newline at end of file
diff --git a/tests/data/npm_gitlab.json b/tests/data/npm_gitlab.json
new file mode 100644
index 00000000..109e4376
--- /dev/null
+++ b/tests/data/npm_gitlab.json
@@ -0,0 +1,3200 @@
+[
+  {
+    "test_index": 1,
+    "scheme": "npm",
+    "gitlab_native": "<4.2.0",
+    "expected_vers": "vers:npm/<4.2.0"
+  },
+  {
+    "test_index": 2,
+    "scheme": "npm",
+    "gitlab_native": "<=3.3",
+    "expected_vers": "vers:npm/<=3.3.0"
+  },
+  {
+    "test_index": 3,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 4,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 5,
+    "scheme": "npm",
+    "gitlab_native": ">=0.0.0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 6,
+    "scheme": "npm",
+    "gitlab_native": "<0.5.3",
+    "expected_vers": "vers:npm/<0.5.3"
+  },
+  {
+    "test_index": 7,
+    "scheme": "npm",
+    "gitlab_native": "<=0.3.0",
+    "expected_vers": "vers:npm/<=0.3.0"
+  },
+  {
+    "test_index": 8,
+    "scheme": "npm",
+    "gitlab_native": "<0.3.1",
+    "expected_vers": "vers:npm/<0.3.1"
+  },
+  {
+    "test_index": 9,
+    "scheme": "npm",
+    "gitlab_native": "<0.3.4",
+    "expected_vers": "vers:npm/<0.3.4"
+  },
+  {
+    "test_index": 10,
+    "scheme": "npm",
+    "gitlab_native": "<3.1.0",
+    "expected_vers": "vers:npm/<3.1.0"
+  },
+  {
+    "test_index": 11,
+    "scheme": "npm",
+    "gitlab_native": ">=0.0.0-alpha",
+    "expected_vers": "vers:npm/>=0.0.0-alpha"
+  },
+  {
+    "test_index": 12,
+    "scheme": "npm",
+    "gitlab_native": "<=0.0.1",
+    "expected_vers": "vers:npm/<=0.0.1"
+  },
+  {
+    "test_index": 13,
+    "scheme": "npm",
+    "gitlab_native": "<0.4.9",
+    "expected_vers": "vers:npm/<0.4.9"
+  },
+  {
+    "test_index": 14,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 15,
+    "scheme": "npm",
+    "gitlab_native": "<=0.5.0",
+    "expected_vers": "vers:npm/<=0.5.0"
+  },
+  {
+    "test_index": 16,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 17,
+    "scheme": "npm",
+    "gitlab_native": "=1.0.0",
+    "expected_vers": "vers:npm/1.0.0"
+  },
+  {
+    "test_index": 18,
+    "scheme": "npm",
+    "gitlab_native": ">=0.0.0-alpha",
+    "expected_vers": "vers:npm/>=0.0.0-alpha"
+  },
+  {
+    "test_index": 19,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 20,
+    "scheme": "npm",
+    "gitlab_native": "<3.1.6",
+    "expected_vers": "vers:npm/<3.1.6"
+  },
+  {
+    "test_index": 21,
+    "scheme": "npm",
+    "gitlab_native": "<=0.0.9",
+    "expected_vers": "vers:npm/<=0.0.9"
+  },
+  {
+    "test_index": 22,
+    "scheme": "npm",
+    "gitlab_native": "<=0.0.9",
+    "expected_vers": "vers:npm/<=0.0.9"
+  },
+  {
+    "test_index": 23,
+    "scheme": "npm",
+    "gitlab_native": "<=0.0.9",
+    "expected_vers": "vers:npm/<=0.0.9"
+  },
+  {
+    "test_index": 24,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 25,
+    "scheme": "npm",
+    "gitlab_native": "<1.1.0",
+    "expected_vers": "vers:npm/<1.1.0"
+  },
+  {
+    "test_index": 26,
+    "scheme": "npm",
+    "gitlab_native": "=1.0.0",
+    "expected_vers": "vers:npm/1.0.0"
+  },
+  {
+    "test_index": 27,
+    "scheme": "npm",
+    "gitlab_native": ">=0.0.0-alpha",
+    "expected_vers": "vers:npm/>=0.0.0-alpha"
+  },
+  {
+    "test_index": 28,
+    "scheme": "npm",
+    "gitlab_native": ">=0.0.0-alpha",
+    "expected_vers": "vers:npm/>=0.0.0-alpha"
+  },
+  {
+    "test_index": 29,
+    "scheme": "npm",
+    "gitlab_native": "=1.0.0",
+    "expected_vers": "vers:npm/1.0.0"
+  },
+  {
+    "test_index": 30,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 31,
+    "scheme": "npm",
+    "gitlab_native": "<3.8.1",
+    "expected_vers": "vers:npm/<3.8.1"
+  },
+  {
+    "test_index": 32,
+    "scheme": "npm",
+    "gitlab_native": "<3.8.1",
+    "expected_vers": "vers:npm/<3.8.1"
+  },
+  {
+    "test_index": 33,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 34,
+    "scheme": "npm",
+    "gitlab_native": ">=0.0.0-alpha",
+    "expected_vers": "vers:npm/>=0.0.0-alpha"
+  },
+  {
+    "test_index": 35,
+    "scheme": "npm",
+    "gitlab_native": "<=2.48.0",
+    "expected_vers": "vers:npm/<=2.48.0"
+  },
+  {
+    "test_index": 36,
+    "scheme": "npm",
+    "gitlab_native": "<7.4.4",
+    "expected_vers": "vers:npm/<7.4.4"
+  },
+  {
+    "test_index": 37,
+    "scheme": "npm",
+    "gitlab_native": "<1.10.0",
+    "expected_vers": "vers:npm/<1.10.0"
+  },
+  {
+    "test_index": 38,
+    "scheme": "npm",
+    "gitlab_native": "<=2.5.0",
+    "expected_vers": "vers:npm/<=2.5.0"
+  },
+  {
+    "test_index": 39,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 40,
+    "scheme": "npm",
+    "gitlab_native": "<0.0.25",
+    "expected_vers": "vers:npm/<0.0.25"
+  },
+  {
+    "test_index": 41,
+    "scheme": "npm",
+    "gitlab_native": "<=0.0.25",
+    "expected_vers": "vers:npm/<=0.0.25"
+  },
+  {
+    "test_index": 42,
+    "scheme": "npm",
+    "gitlab_native": ">=0.0.0-alpha",
+    "expected_vers": "vers:npm/>=0.0.0-alpha"
+  },
+  {
+    "test_index": 43,
+    "scheme": "npm",
+    "gitlab_native": "<=1.0.0",
+    "expected_vers": "vers:npm/<=1.0.0"
+  },
+  {
+    "test_index": 44,
+    "scheme": "npm",
+    "gitlab_native": "<8.31.2",
+    "expected_vers": "vers:npm/<8.31.2"
+  },
+  {
+    "test_index": 45,
+    "scheme": "npm",
+    "gitlab_native": "=8.0.0",
+    "expected_vers": "vers:npm/8.0.0"
+  },
+  {
+    "test_index": 46,
+    "scheme": "npm",
+    "gitlab_native": "<39.1.0",
+    "expected_vers": "vers:npm/<39.1.0"
+  },
+  {
+    "test_index": 47,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 48,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 49,
+    "scheme": "npm",
+    "gitlab_native": "=0.1.2",
+    "expected_vers": "vers:npm/0.1.2"
+  },
+  {
+    "test_index": 50,
+    "scheme": "npm",
+    "gitlab_native": "<13.0.8",
+    "expected_vers": "vers:npm/<13.0.8"
+  },
+  {
+    "test_index": 51,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 52,
+    "scheme": "npm",
+    "gitlab_native": "<2.1.4||>=3.0.0 <6.0.6",
+    "expected_vers": "vers:npm/<2.1.4|>=3.0.0|<6.0.6"
+  },
+  {
+    "test_index": 53,
+    "scheme": "npm",
+    "gitlab_native": "<2.1.4||>=3.0.0 <6.0.6",
+    "expected_vers": "vers:npm/<2.1.4|>=3.0.0|<6.0.6"
+  },
+  {
+    "test_index": 54,
+    "scheme": "npm",
+    "gitlab_native": "<7.3.1",
+    "expected_vers": "vers:npm/<7.3.1"
+  },
+  {
+    "test_index": 55,
+    "scheme": "npm",
+    "gitlab_native": "<1.1.0",
+    "expected_vers": "vers:npm/<1.1.0"
+  },
+  {
+    "test_index": 56,
+    "scheme": "npm",
+    "gitlab_native": "=2.0.43",
+    "expected_vers": "vers:npm/2.0.43"
+  },
+  {
+    "test_index": 57,
+    "scheme": "npm",
+    "gitlab_native": "<0.1.7",
+    "expected_vers": "vers:npm/<0.1.7"
+  },
+  {
+    "test_index": 58,
+    "scheme": "npm",
+    "gitlab_native": "<0.5.1",
+    "expected_vers": "vers:npm/<0.5.1"
+  },
+  {
+    "test_index": 59,
+    "scheme": "npm",
+    "gitlab_native": "<1.0.0",
+    "expected_vers": "vers:npm/<1.0.0"
+  },
+  {
+    "test_index": 60,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 61,
+    "scheme": "npm",
+    "gitlab_native": "=0.4.0",
+    "expected_vers": "vers:npm/0.4.0"
+  },
+  {
+    "test_index": 62,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 63,
+    "scheme": "npm",
+    "gitlab_native": "=1.1.7",
+    "expected_vers": "vers:npm/1.1.7"
+  },
+  {
+    "test_index": 64,
+    "scheme": "npm",
+    "gitlab_native": "<0.2.6",
+    "expected_vers": "vers:npm/<0.2.6"
+  },
+  {
+    "test_index": 65,
+    "scheme": "npm",
+    "gitlab_native": "<3.4.6 || >=4.0.0 <4.0.5",
+    "expected_vers": "vers:npm/<3.4.6|>=4.0.0|<4.0.5"
+  },
+  {
+    "test_index": 66,
+    "scheme": "npm",
+    "gitlab_native": "<3.4.6||>=4.0.0 <4.0.5",
+    "expected_vers": "vers:npm/<3.4.6|>=4.0.0|<4.0.5"
+  },
+  {
+    "test_index": 67,
+    "scheme": "npm",
+    "gitlab_native": "<3.5.1||>=4.0.0 <=4.1.3||>=5.0.0 <=5.6.1||>=6.0.0 <=6.1.2",
+    "expected_vers": "vers:npm/<3.5.1|>=4.0.0|<=4.1.3|>=5.0.0|<=5.6.1|>=6.0.0|<=6.1.2"
+  },
+  {
+    "test_index": 68,
+    "scheme": "npm",
+    "gitlab_native": "<0.5.2",
+    "expected_vers": "vers:npm/<0.5.2"
+  },
+  {
+    "test_index": 69,
+    "scheme": "npm",
+    "gitlab_native": "<0.4.4",
+    "expected_vers": "vers:npm/<0.4.4"
+  },
+  {
+    "test_index": 70,
+    "scheme": "npm",
+    "gitlab_native": ">=0",
+    "expected_vers": "vers:npm/>=0.0.0"
+  },
+  {
+    "test_index": 71,
+    "scheme": "npm",
+    "gitlab_native": ">=0.0.0-alpha",
+    "expected_vers": "vers:npm/>=0.0.0-alpha"
+  },
+  {
+    "test_index": 72,
+    "scheme": "npm",
+    "gitlab_native": ">=0.0.0-alpha",
+    "expected_vers": "vers:npm/>=0.0.0-alpha"
+  },
+  {
+    "test_index": 73,
+    "scheme": "npm",
+    "gitlab_native": "<=0.2.3",
+    "expected_vers": "vers:npm/<=0.2.3"
+  },
+  {
+    "test_index": 74,
+    "scheme": "npm",
+    "gitlab_native": "=1.0.3",
+    "expected_vers": "vers:npm/1.0.3"
+  },
+  {
+    "test_index": 75,
+    "scheme": "npm",
+    "gitlab_native": "<4.2.0",
+    "expected_vers": "vers:npm/<4.2.0"
+  },
+  {
+    "test_index": 76,
+    "scheme": "npm",
+    "gitlab_native": "<3.0.5",
+    "expected_vers": "vers:npm/<3.0.5"
+  },
+  {
+    "test_index": 77,
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\ No newline at end of file
diff --git a/tests/data/pypi_gitlab.json b/tests/data/pypi_gitlab.json
new file mode 100644
index 00000000..bcf2263b
--- /dev/null
+++ b/tests/data/pypi_gitlab.json
@@ -0,0 +1,734 @@
+[
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+    "expected_vers": "vers:pypi/>=7.0.0|<=11.0.4|>=12.0.0|<=12.0.2|13.0.0"
+  },
+  {
+    "test_index": 68,
+    "scheme": "pypi",
+    "gitlab_native": "<16.4.1||>=17.0.0,<17.2.1||>=18.0.0,<18.1.1",
+    "expected_vers": "vers:pypi/<16.4.1|>=17.0.0|<17.2.1|>=18.0.0|<18.1.1"
+  },
+  {
+    "test_index": 69,
+    "scheme": "pypi",
+    "gitlab_native": "<10.0.8||>=11.0.0,<11.0.7||>=12.0.0,<12.0.6||>=13.0.0,<13.0.3",
+    "expected_vers": "vers:pypi/<10.0.8|>=11.0.0|<11.0.7|>=12.0.0|<12.0.6|>=13.0.0|<13.0.3"
+  },
+  {
+    "test_index": 70,
+    "scheme": "pypi",
+    "gitlab_native": "<6.2.3||==7.0.0",
+    "expected_vers": "vers:pypi/<6.2.3|7.0.0"
+  },
+  {
+    "test_index": 71,
+    "scheme": "pypi",
+    "gitlab_native": "<6.2.3||==7.0.0",
+    "expected_vers": "vers:pypi/<6.2.3|7.0.0"
+  },
+  {
+    "test_index": 72,
+    "scheme": "pypi",
+    "gitlab_native": "<6.2.3||==7.0.0",
+    "expected_vers": "vers:pypi/<6.2.3|7.0.0"
+  },
+  {
+    "test_index": 73,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.3.0,<2.3.2||>=2.5.0,<2.5.2",
+    "expected_vers": "vers:pypi/>=2.3.0|<2.3.2|>=2.5.0|<2.5.2"
+  },
+  {
+    "test_index": 74,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.0,<=1.1.7||>=1.2,<=8.2.0",
+    "expected_vers": "vers:pypi/>=1.0|<=1.1.7|>=1.2|<=8.2.0"
+  },
+  {
+    "test_index": 75,
+    "scheme": "pypi",
+    "gitlab_native": "<4.6.1||>=5.0.0,<5.2.1",
+    "expected_vers": "vers:pypi/<4.6.1|>=5.0.0|<5.2.1"
+  },
+  {
+    "test_index": 76,
+    "scheme": "pypi",
+    "gitlab_native": ">=4.0,<4.6.3||>=5.0,<5.3",
+    "expected_vers": "vers:pypi/>=4.0|<4.6.3|>=5.0|<5.3"
+  },
+  {
+    "test_index": 77,
+    "scheme": "pypi",
+    "gitlab_native": "<4.6||>=5.0,<5.2",
+    "expected_vers": "vers:pypi/<4.6|>=5.0|<5.2"
+  },
+  {
+    "test_index": 78,
+    "scheme": "pypi",
+    "gitlab_native": "<0.13.7||>=0.14.0,<0.14.6",
+    "expected_vers": "vers:pypi/<0.13.7|>=0.14.0|<0.14.6"
+  },
+  {
+    "test_index": 79,
+    "scheme": "pypi",
+    "gitlab_native": "<7.5.7||>=8.0.0,<8.1.0",
+    "expected_vers": "vers:pypi/<7.5.7|>=8.0.0|<8.1.0"
+  },
+  {
+    "test_index": 80,
+    "scheme": "pypi",
+    "gitlab_native": "<=5.10.0||>=6.0.0,<7.16.3||>=7.17.0,<7.31.1||>=8.0.0,<8.0.1",
+    "expected_vers": "vers:pypi/<=5.10.0|>=6.0.0|<7.16.3|>=7.17.0|<7.31.1|>=8.0.0|<8.0.1"
+  },
+  {
+    "test_index": 81,
+    "scheme": "pypi",
+    "gitlab_native": ">=3.4.0,<3.4.7||>=3.5.0,<3.5.4||>=3.6.0,<3.6.1||>=3.7.0",
+    "expected_vers": "vers:pypi/>=3.4.0|<3.4.7|>=3.5.0|<3.5.4|>=3.6.0|<3.6.1|>=3.7.0"
+  },
+  {
+    "test_index": 82,
+    "scheme": "pypi",
+    "gitlab_native": "<=3.4.6.27||>=4.0.0.21,<=4.1.0.25",
+    "expected_vers": "vers:pypi/<=3.4.6.27|>=4.0.0.21|<=4.1.0.25"
+  },
+  {
+    "test_index": 83,
+    "scheme": "pypi",
+    "gitlab_native": "<=3.4.6.27||>=4.0.0.21,<=4.1.0.25",
+    "expected_vers": "vers:pypi/<=3.4.6.27|>=4.0.0.21|<=4.1.0.25"
+  },
+  {
+    "test_index": 84,
+    "scheme": "pypi",
+    "gitlab_native": "<1.9.0||>=2.0.0,<2.2.0",
+    "expected_vers": "vers:pypi/<1.9.0|>=2.0.0|<2.2.0"
+  },
+  {
+    "test_index": 85,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.0.0,<1.1.1||>=2.0.0,<2.1.1||>=3.0.0,<=3.1.1",
+    "expected_vers": "vers:pypi/>=1.0.0|<1.1.1|>=2.0.0|<2.1.1|>=3.0.0|<=3.1.1"
+  },
+  {
+    "test_index": 86,
+    "scheme": "pypi",
+    "gitlab_native": "<1.8.2||>=2.0.0,<2.3.1",
+    "expected_vers": "vers:pypi/<1.8.2|>=2.0.0|<2.3.1"
+  },
+  {
+    "test_index": 87,
+    "scheme": "pypi",
+    "gitlab_native": "==3.1||>=4.0.0,<=4.0.2",
+    "expected_vers": "vers:pypi/3.1|>=4.0.0|<=4.0.2"
+  },
+  {
+    "test_index": 88,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.1,<2.1.15||>=2.2,<2.2.8",
+    "expected_vers": "vers:pypi/>=2.1|<2.1.15|>=2.2|<2.2.8"
+  },
+  {
+    "test_index": 89,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.4,<1.4.11||>=1.5,<1.5.6||>=1.6,<1.6.3",
+    "expected_vers": "vers:pypi/>=1.4|<1.4.11|>=1.5|<1.5.6|>=1.6|<1.6.3"
+  },
+  {
+    "test_index": 90,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.8.0a,<1.8.10||>=1.9.0a,<1.9.3",
+    "expected_vers": "vers:pypi/>=1.8.0a0|<1.8.10|>=1.9.0a0|<1.9.3"
+  },
+  {
+    "test_index": 91,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.2.0,<1.2.7||>=1.3.0,<1.3.1",
+    "expected_vers": "vers:pypi/>=1.2.0|<1.2.7|>=1.3.0|<1.3.1"
+  },
+  {
+    "test_index": 92,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.2,<2.2.26||>=3.2,<3.2.11||>=4.0,<4.0.1",
+    "expected_vers": "vers:pypi/>=2.2|<2.2.26|>=3.2|<3.2.11|>=4.0|<4.0.1"
+  },
+  {
+    "test_index": 93,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.11.8,<=1.11.9||>=2.0,<=2.0.1",
+    "expected_vers": "vers:pypi/>=1.11.8|<=1.11.9|>=2.0|<=2.0.1"
+  },
+  {
+    "test_index": 94,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.2,<2.2.16||>=3.0,<3.0.10||>=3.1,<3.1.1",
+    "expected_vers": "vers:pypi/>=2.2|<2.2.16|>=3.0|<3.0.10|>=3.1|<3.1.1"
+  },
+  {
+    "test_index": 95,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.3.0,<1.3.1||>=1.2.0,<1.2.7",
+    "expected_vers": "vers:pypi/>=1.2.0|<1.2.7|>=1.3.0|<1.3.1"
+  },
+  {
+    "test_index": 96,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.1.0,<1.1.4||>=1.2.0,<1.2.5",
+    "expected_vers": "vers:pypi/>=1.1.0|<1.1.4|>=1.2.0|<1.2.5"
+  },
+  {
+    "test_index": 97,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.2,<2.2.27||>=3.2,<3.2.12||>=4.0,<4.0.2",
+    "expected_vers": "vers:pypi/>=2.2|<2.2.27|>=3.2|<3.2.12|>=4.0|<4.0.2"
+  },
+  {
+    "test_index": 98,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.11,<1.11.15||>=2.0,<2.0.8",
+    "expected_vers": "vers:pypi/>=1.11|<1.11.15|>=2.0|<2.0.8"
+  },
+  {
+    "test_index": 99,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.2,<2.2.26||>=3.2,<3.2.11||>=4.0,<4.0.1",
+    "expected_vers": "vers:pypi/>=2.2|<2.2.26|>=3.2|<3.2.11|>=4.0|<4.0.1"
+  },
+  {
+    "test_index": 100,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.11.0,<1.11.19||>=2.0.0,<2.0.11||>=2.1.0,<2.1.6",
+    "expected_vers": "vers:pypi/>=1.11.0|<1.11.19|>=2.0.0|<2.0.11|>=2.1.0|<2.1.6"
+  },
+  {
+    "test_index": 101,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.11alpha,<1.11||>=1.10.0alpha,<1.10.7||>=1.9.0alpha,<1.9.13||<1.8.18",
+    "expected_vers": "vers:pypi/<1.8.18|>=1.9.0a0|<1.9.13|>=1.10.0a0|<1.10.7|>=1.11a0|<1.11"
+  },
+  {
+    "test_index": 102,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.4,<1.4.13||>=1.5,<1.5.8||>=1.6,<1.6.5||>=1.7.b1,<1.7b3",
+    "expected_vers": "vers:pypi/>=1.4|<1.4.13|>=1.5|<1.5.8|>=1.6|<1.6.5|>=1.7b1|<1.7b3"
+  },
+  {
+    "test_index": 103,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.4,<1.4.11||>=1.5,<1.5.6||>=1.6,<1.6.3",
+    "expected_vers": "vers:pypi/>=1.4|<1.4.11|>=1.5|<1.5.6|>=1.6|<1.6.3"
+  },
+  {
+    "test_index": 104,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.11,<1.11.21||>=2.1,<2.1.9||>=2.2,<2.2.2",
+    "expected_vers": "vers:pypi/>=1.11|<1.11.21|>=2.1|<2.1.9|>=2.2|<2.2.2"
+  },
+  {
+    "test_index": 105,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.8.0a,<1.8.10||>=1.9.0a,<1.9.3",
+    "expected_vers": "vers:pypi/>=1.8.0a0|<1.8.10|>=1.9.0a0|<1.9.3"
+  },
+  {
+    "test_index": 106,
+    "scheme": "pypi",
+    "gitlab_native": "<1.11.27||>=2.2,<2.2.9||==3.0",
+    "expected_vers": "vers:pypi/<1.11.27|>=2.2|<2.2.9|3.0"
+  },
+  {
+    "test_index": 107,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.8.0a,<1.8.3||>=1.7.0a,<1.7.9||>=1.4.0a,<1.4.21",
+    "expected_vers": "vers:pypi/>=1.4.0a0|<1.4.21|>=1.7.0a0|<1.7.9|>=1.8.0a0|<1.8.3"
+  },
+  {
+    "test_index": 108,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.10.0alpha,<1.10.3||>=1.9.0alpha,<1.9.11||<1.8.16",
+    "expected_vers": "vers:pypi/<1.8.16|>=1.9.0a0|<1.9.11|>=1.10.0a0|<1.10.3"
+  },
+  {
+    "test_index": 109,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.8.0a,<1.8.4||>=1.7.0a,<1.7.10||>=1.4.0a,<1.4.22",
+    "expected_vers": "vers:pypi/>=1.4.0a0|<1.4.22|>=1.7.0a0|<1.7.10|>=1.8.0a0|<1.8.4"
+  },
+  {
+    "test_index": 110,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.2,<2.2.13||>=3.0,<3.0.7",
+    "expected_vers": "vers:pypi/>=2.2|<2.2.13|>=3.0|<3.0.7"
+  },
+  {
+    "test_index": 111,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.11,<1.11.23||>=2.1,<2.1.11||>=2.2,<2.2.4",
+    "expected_vers": "vers:pypi/>=1.11|<1.11.23|>=2.1|<2.1.11|>=2.2|<2.2.4"
+  },
+  {
+    "test_index": 112,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.2,<2.2.25||>=3.1,<3.1.14||>=3.2,<3.2.10",
+    "expected_vers": "vers:pypi/>=2.2|<2.2.25|>=3.1|<3.1.14|>=3.2|<3.2.10"
+  },
+  {
+    "test_index": 113,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.11,<1.11.22||>=2.1,<2.1.10||>=2.2,<2.2.3",
+    "expected_vers": "vers:pypi/>=1.11|<1.11.22|>=2.1|<2.1.10|>=2.2|<2.2.3"
+  },
+  {
+    "test_index": 114,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.8,<1.8.19||>=1.11,<1.11.11||>=2.0,<2.0.3",
+    "expected_vers": "vers:pypi/>=1.8|<1.8.19|>=1.11|<1.11.11|>=2.0|<2.0.3"
+  },
+  {
+    "test_index": 115,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.2,<2.2.19||>=3.0,<3.0.13||>=3.1,<3.1.7",
+    "expected_vers": "vers:pypi/>=2.2|<2.2.19|>=3.0|<3.0.13|>=3.1|<3.1.7"
+  },
+  {
+    "test_index": 116,
+    "scheme": "pypi",
+    "gitlab_native": "<2.2.24||>=3.0.0,<3.1.12||>=3.2.0,<3.2.4",
+    "expected_vers": "vers:pypi/<2.2.24|>=3.0.0|<3.1.12|>=3.2.0|<3.2.4"
+  },
+  {
+    "test_index": 117,
+    "scheme": "pypi",
+    "gitlab_native": "<1.2.7||>=1.3.0,<1.3.1",
+    "expected_vers": "vers:pypi/<1.2.7|>=1.3.0|<1.3.1"
+  },
+  {
+    "test_index": 118,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.1.0,<1.1.4||>=1.2.0,<1.2.5",
+    "expected_vers": "vers:pypi/>=1.1.0|<1.1.4|>=1.2.0|<1.2.5"
+  },
+  {
+    "test_index": 119,
+    "scheme": "pypi",
+    "gitlab_native": ">=2.2,<2.2.26||>=3.2,<3.2.11||>=4.0,<4.0.1",
+    "expected_vers": "vers:pypi/>=2.2|<2.2.26|>=3.2|<3.2.11|>=4.0|<4.0.1"
+  },
+  {
+    "test_index": 120,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.10.0,<=1.10.7||>=1.11.0,<=1.11.4",
+    "expected_vers": "vers:pypi/>=1.10.0|<=1.10.7|>=1.11.0|<=1.11.4"
+  },
+  {
+    "test_index": 121,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.1.0,<1.1.4||>=1.2.0,<1.2.5",
+    "expected_vers": "vers:pypi/>=1.1.0|<1.1.4|>=1.2.0|<1.2.5"
+  },
+  {
+    "test_index": 122,
+    "scheme": "pypi",
+    "gitlab_native": ">=1.9.0alpha,<1.9.10||<1.8.15",
+    "expected_vers": "vers:pypi/<1.8.15|>=1.9.0a0|<1.9.10"
+  }
+]
\ No newline at end of file
diff --git a/tests/test_version_range.py b/tests/test_version_range.py
index b2a81048..5bf86f06 100644
--- a/tests/test_version_range.py
+++ b/tests/test_version_range.py
@@ -4,11 +4,13 @@
 #
 # Visit https://aboutcode.org and https://github.com/nexB/univers for support and download.
 
+import json
 from unittest import TestCase
 import pytest
 
 from univers.version_constraint import VersionConstraint
 from univers.version_range import GemVersionRange
+from univers.version_range import GitLabVersionRange
 from univers.version_range import NugetVersionRange
 from univers.version_range import InvalidVersionRange
 from univers.version_range import PypiVersionRange
@@ -330,3 +332,30 @@ def test_PypiVersionRange_raises_ivr_for_unsupported_and_invalid_ranges(range, w
             assert expected in str(ivre)
     else:
         assert expected == str(PypiVersionRange.from_native(range))
+
+
+@pytest.mark.parametrize("test_case", json.load(open("./tests/data/pypi_gitlab.json")))
+def test_pypi_gitlab_version_range_parse(test_case):
+    result = GitLabVersionRange.from_gitlab_native(
+        scheme=test_case["scheme"],
+        string=test_case["gitlab_native"],
+    )
+    assert str(result) == test_case["expected_vers"]
+
+
+@pytest.mark.parametrize("test_case", json.load(open("./tests/data/npm_gitlab.json")))
+def test_npm_gitlab_version_range_parse(test_case):
+    result = GitLabVersionRange.from_gitlab_native(
+        scheme=test_case["scheme"],
+        string=test_case["gitlab_native"],
+    )
+    assert str(result) == test_case["expected_vers"]
+
+
+@pytest.mark.parametrize("test_case", json.load(open("./tests/data/gem_gitlab.json")))
+def test_gem_gitlab_version_range_parse(test_case):
+    result = GitLabVersionRange.from_gitlab_native(
+        scheme=test_case["scheme"],
+        string=test_case["gitlab_native"],
+    )
+    assert str(result) == test_case["expected_vers"]