diff --git a/cyclonedx/schema/_res/README.md b/cyclonedx/schema/_res/README.md
index 5596be0f8..fcc5cd081 100644
--- a/cyclonedx/schema/_res/README.md
+++ b/cyclonedx/schema/_res/README.md
@@ -30,5 +30,5 @@ changes:
 1. `https?://cyclonedx.org/schema/spdx` was replaced with `spdx.SNAPSHOT.xsd`
 2. `spdx.schema.json` was replaced with `spdx.SNAPSHOT.schema.json`
 3. `jsf-0.82.schema.json` was replaced with `jsf-0.82.SNAPSHOT.schema.json`
-4. `properties.$schema.enum` was fixed to match `$id`
+4. `properties.$schema.enum` was removed
 5. `required.version` removed, as it is actually optional with default value
diff --git a/cyclonedx/schema/_res/bom-1.2-strict.SNAPSHOT.schema.json b/cyclonedx/schema/_res/bom-1.2-strict.SNAPSHOT.schema.json
index 682cf739d..a36fb4b6c 100644
--- a/cyclonedx/schema/_res/bom-1.2-strict.SNAPSHOT.schema.json
+++ b/cyclonedx/schema/_res/bom-1.2-strict.SNAPSHOT.schema.json
@@ -11,10 +11,7 @@
   "additionalProperties": false,
   "properties": {
     "$schema": {
-      "type": "string",
-      "enum": [
-        "http://cyclonedx.org/schema/bom-1.2b.schema.json"
-      ]
+      "type": "string"
     },
     "bomFormat": {
       "$id": "#/properties/bomFormat",
diff --git a/cyclonedx/schema/_res/bom-1.3-strict.SNAPSHOT.schema.json b/cyclonedx/schema/_res/bom-1.3-strict.SNAPSHOT.schema.json
index a11426201..3f1b82d92 100644
--- a/cyclonedx/schema/_res/bom-1.3-strict.SNAPSHOT.schema.json
+++ b/cyclonedx/schema/_res/bom-1.3-strict.SNAPSHOT.schema.json
@@ -11,10 +11,7 @@
   "additionalProperties": false,
   "properties": {
     "$schema": {
-      "type": "string",
-      "enum": [
-        "http://cyclonedx.org/schema/bom-1.3a.schema.json"
-      ]
+      "type": "string"
     },
     "bomFormat": {
       "$id": "#/properties/bomFormat",
diff --git a/cyclonedx/schema/_res/bom-1.4.SNAPSHOT.schema.json b/cyclonedx/schema/_res/bom-1.4.SNAPSHOT.schema.json
index 1a8858104..48a462e30 100644
--- a/cyclonedx/schema/_res/bom-1.4.SNAPSHOT.schema.json
+++ b/cyclonedx/schema/_res/bom-1.4.SNAPSHOT.schema.json
@@ -11,10 +11,7 @@
   "additionalProperties": false,
   "properties": {
     "$schema": {
-      "type": "string",
-      "enum": [
-        "http://cyclonedx.org/schema/bom-1.4.schema.json"
-      ]
+      "type": "string"
     },
     "bomFormat": {
       "type": "string",
diff --git a/cyclonedx/schema/_res/bom-1.5.SNAPSHOT.schema.json b/cyclonedx/schema/_res/bom-1.5.SNAPSHOT.schema.json
index 7edeab0f0..72781e909 100644
--- a/cyclonedx/schema/_res/bom-1.5.SNAPSHOT.schema.json
+++ b/cyclonedx/schema/_res/bom-1.5.SNAPSHOT.schema.json
@@ -11,10 +11,7 @@
   "additionalProperties": false,
   "properties": {
     "$schema": {
-      "type": "string",
-      "enum": [
-        "http://cyclonedx.org/schema/bom-1.5.schema.json"
-      ]
+      "type": "string"
     },
     "bomFormat": {
       "type": "string",
diff --git a/tests/_data/own/json/1.2/bom_with_mixed_licenses.json b/tests/_data/own/json/1.2/bom_with_mixed_licenses.json
index da4d3c54f..7408922a8 100644
--- a/tests/_data/own/json/1.2/bom_with_mixed_licenses.json
+++ b/tests/_data/own/json/1.2/bom_with_mixed_licenses.json
@@ -1,7 +1,7 @@
 {
-  "$schema": "http://cyclonedx.org/schema/bom-1.4.schema.json",
+  "$schema": "http://cyclonedx.org/schema/bom-1.2.schema.json",
   "bomFormat": "CycloneDX",
-  "specVersion": "1.4",
+  "specVersion": "1.2",
   "metadata": {
     "component": {
       "description": "before CDX 1.5 it was allowed to mix `expression` and `license`",
@@ -11,13 +11,9 @@
         {"license": {"name": "foo license"}}
       ],
       "name": "app",
-      "type": "application"
-    },
-    "licenses": [
-      {"license": {"name": "foo license"}},
-      {"license": {"id": "MIT"}},
-      {"expression": "MIT OR Apache-2.0"}
-    ]
+      "type": "application",
+      "version": "1.2"
+    }
   },
   "components": [
     {
@@ -28,7 +24,8 @@
         {"expression": "MIT OR Apache-2.0"}
       ],
       "name": "comp",
-      "type": "library"
+      "type": "library",
+      "version": "1337"
     }
   ],
   "services": [
diff --git a/tests/_data/own/json/1.3/bom_with_mixed_licenses.json b/tests/_data/own/json/1.3/bom_with_mixed_licenses.json
index da4d3c54f..270a246cd 100644
--- a/tests/_data/own/json/1.3/bom_with_mixed_licenses.json
+++ b/tests/_data/own/json/1.3/bom_with_mixed_licenses.json
@@ -1,7 +1,7 @@
 {
-  "$schema": "http://cyclonedx.org/schema/bom-1.4.schema.json",
+  "$schema": "http://cyclonedx.org/schema/bom-1.3.schema.json",
   "bomFormat": "CycloneDX",
-  "specVersion": "1.4",
+  "specVersion": "1.3",
   "metadata": {
     "component": {
       "description": "before CDX 1.5 it was allowed to mix `expression` and `license`",
@@ -11,7 +11,8 @@
         {"license": {"name": "foo license"}}
       ],
       "name": "app",
-      "type": "application"
+      "type": "application",
+      "version": "1.3"
     },
     "licenses": [
       {"license": {"name": "foo license"}},
@@ -28,7 +29,8 @@
         {"expression": "MIT OR Apache-2.0"}
       ],
       "name": "comp",
-      "type": "library"
+      "type": "library",
+      "version": "1337"
     }
   ],
   "services": [
diff --git a/tests/test_deserialize_json.py b/tests/test_deserialize_json.py
index 23077858a..c85664b03 100644
--- a/tests/test_deserialize_json.py
+++ b/tests/test_deserialize_json.py
@@ -67,7 +67,8 @@ def test(ls: LicenseRepository) -> None:
         with open(json_file) as f:
             json = json_loads(f.read())
         bom: Bom = Bom.from_json(json)
-        test(bom.metadata.licenses)
+        if sv is not SchemaVersion.V1_2:
+            test(bom.metadata.licenses)
         test(bom.metadata.component.licenses)
         test(list(bom.components)[0].licenses)
         test(list(bom.services)[0].licenses)
diff --git a/tests/test_validation_json.py b/tests/test_validation_json.py
index 043592b0f..7a2971898 100644
--- a/tests/test_validation_json.py
+++ b/tests/test_validation_json.py
@@ -16,6 +16,7 @@
 # Copyright (c) OWASP Foundation. All Rights Reserved.
 
 from glob import iglob
+from itertools import chain
 from os.path import join
 from typing import Generator
 from unittest import TestCase
@@ -25,18 +26,25 @@
 from cyclonedx.exception import MissingOptionalDependencyException
 from cyclonedx.schema import OutputFormat, SchemaVersion
 from cyclonedx.validation.json import JsonStrictValidator, JsonValidator
-from tests import SCHEMA_TESTDATA_DIRECTORY, DpTuple
+from tests import OWN_DATA_DIRECTORY, SCHEMA_TESTDATA_DIRECTORY, DpTuple
 
 UNSUPPORTED_SCHEMA_VERSIONS = {SchemaVersion.V1_0, SchemaVersion.V1_1, }
 
 
-def _dp(prefix: str) -> Generator:
+def _dp_sv_tf(prefix: str) -> Generator:
     return (
         DpTuple((sv, tf)) for sv in SchemaVersion if sv not in UNSUPPORTED_SCHEMA_VERSIONS
         for tf in iglob(join(SCHEMA_TESTDATA_DIRECTORY, sv.to_version(), f'{prefix}-*.json'))
     )
 
 
+def _dp_sv_own() -> Generator:
+    return (
+        DpTuple((sv, tf)) for sv in SchemaVersion if sv not in UNSUPPORTED_SCHEMA_VERSIONS
+        for tf in iglob(join(OWN_DATA_DIRECTORY, 'json', sv.to_version(), '*.json'))
+    )
+
+
 @ddt
 class TestJsonValidator(TestCase):
 
@@ -51,7 +59,10 @@ def test_throws_with_unsupported_schema_version(self, schema_version: SchemaVers
         with self.assertRaisesRegex(ValueError, 'Unsupported schema_version'):
             JsonValidator(schema_version)
 
-    @idata(_dp('valid'))
+    @idata(chain(
+        _dp_sv_tf('valid'),
+        _dp_sv_own()
+    ))
     @unpack
     def test_validate_no_none(self, schema_version: SchemaVersion, test_data_file: str) -> None:
         validator = JsonValidator(schema_version)
@@ -63,7 +74,7 @@ def test_validate_no_none(self, schema_version: SchemaVersion, test_data_file: s
             self.skipTest('MissingOptionalDependencyException')
         self.assertIsNone(validation_error)
 
-    @idata(_dp('invalid'))
+    @idata(_dp_sv_tf('invalid'))
     @unpack
     def test_validate_expected_error(self, schema_version: SchemaVersion, test_data_file: str) -> None:
         validator = JsonValidator(schema_version)
@@ -85,7 +96,10 @@ def test_throws_with_unsupported_schema_version(self, schema_version: SchemaVers
         with self.assertRaisesRegex(ValueError, 'Unsupported schema_version'):
             JsonStrictValidator(schema_version)
 
-    @idata(_dp('valid'))
+    @idata(chain(
+        _dp_sv_tf('valid'),
+        _dp_sv_own()
+    ))
     @unpack
     def test_validate_no_none(self, schema_version: SchemaVersion, test_data_file: str) -> None:
         validator = JsonStrictValidator(schema_version)
@@ -97,7 +111,7 @@ def test_validate_no_none(self, schema_version: SchemaVersion, test_data_file: s
             self.skipTest('MissingOptionalDependencyException')
         self.assertIsNone(validation_error)
 
-    @idata(_dp('invalid'))
+    @idata(_dp_sv_tf('invalid'))
     @unpack
     def test_validate_expected_error(self, schema_version: SchemaVersion, test_data_file: str) -> None:
         validator = JsonStrictValidator(schema_version)
diff --git a/tests/test_validation_xml.py b/tests/test_validation_xml.py
index ac400c710..e5d914799 100644
--- a/tests/test_validation_xml.py
+++ b/tests/test_validation_xml.py
@@ -16,6 +16,7 @@
 # Copyright (c) OWASP Foundation. All Rights Reserved.
 
 from glob import iglob
+from itertools import chain
 from os.path import join
 from typing import Generator
 from unittest import TestCase
@@ -25,18 +26,25 @@
 from cyclonedx.exception import MissingOptionalDependencyException
 from cyclonedx.schema import OutputFormat, SchemaVersion
 from cyclonedx.validation.xml import XmlValidator
-from tests import SCHEMA_TESTDATA_DIRECTORY, DpTuple
+from tests import OWN_DATA_DIRECTORY, SCHEMA_TESTDATA_DIRECTORY, DpTuple
 
 UNSUPPORTED_SCHEMA_VERSIONS = set()
 
 
-def _dp(prefix: str) -> Generator:
+def _dp_sv_tf(prefix: str) -> Generator:
     return (
         DpTuple((sv, tf)) for sv in SchemaVersion if sv not in UNSUPPORTED_SCHEMA_VERSIONS
         for tf in iglob(join(SCHEMA_TESTDATA_DIRECTORY, sv.to_version(), f'{prefix}-*.xml'))
     )
 
 
+def _dp_sv_own() -> Generator:
+    return (
+        DpTuple((sv, tf)) for sv in SchemaVersion if sv not in UNSUPPORTED_SCHEMA_VERSIONS
+        for tf in iglob(join(OWN_DATA_DIRECTORY, 'xml', sv.to_version(), '*.xml'))
+    )
+
+
 @ddt
 class TestXmlValidator(TestCase):
 
@@ -51,7 +59,10 @@ def test_throws_with_unsupported_schema_version(self, schema_version: SchemaVers
         with self.assertRaisesRegex(ValueError, f'unsupported schema_version: {schema_version}'):
             XmlValidator(schema_version)
 
-    @idata(_dp('valid'))
+    @idata(chain(
+        _dp_sv_tf('valid'),
+        _dp_sv_own()
+    ))
     @unpack
     def test_validate_no_none(self, schema_version: SchemaVersion, test_data_file: str) -> None:
         validator = XmlValidator(schema_version)
@@ -63,7 +74,7 @@ def test_validate_no_none(self, schema_version: SchemaVersion, test_data_file: s
             self.skipTest('MissingOptionalDependencyException')
         self.assertIsNone(validation_error)
 
-    @idata(_dp('invalid'))
+    @idata(_dp_sv_tf('invalid'))
     @unpack
     def test_validate_expected_error(self, schema_version: SchemaVersion, test_data_file: str) -> None:
         validator = XmlValidator(schema_version)
diff --git a/tools/schema-downloader.py b/tools/schema-downloader.py
index 3ef556d09..99def5784 100644
--- a/tools/schema-downloader.py
+++ b/tools/schema-downloader.py
@@ -29,13 +29,14 @@
     ]
 }
 
-# "version" is not required but optional with a default value!
-#   this is wrong in schema<1.5
+# "$schema" is not required but optional.
+#  that enum constraint value there is complicated -> remove it.
+#  See https://github.com/CycloneDX/specification/issues/402
+#  See https://github.com/CycloneDX/specification/pull/403
 _BOM_SCHEMA_ENUM_RE = re.compile(
-    r'("\$id": "(http://cyclonedx\.org/schema/bom.+?\.schema\.json)".*"enum": \[\s+")'
-    r'http://cyclonedx\.org/schema/bom.+?\.schema\.json"',
+    r',?\s*"enum":\s*\[\s*"http://cyclonedx\.org/schema/.+?\.schema\.json"\s*\]',
     re.DOTALL)
-_BOM_SCHEMA_ENUM_REPL = r'\1\2"'
+_BOM_SCHEMA_ENUM_REPL = r''
 
 
 # "version" is not required but optional with a default value!