diff --git a/plinth/modules/coturn/components.py b/plinth/modules/coturn/components.py
index 1e8a83fba..ae05267bf 100644
--- a/plinth/modules/coturn/components.py
+++ b/plinth/modules/coturn/components.py
@@ -17,7 +17,8 @@ TURN_REST_TTL = 24 * 3600
 
 TURN_REST_USER = 'fbxturnuser'
 
-TURN_URI_REGEX = r'(stun|turn):(.*):([0-9]{4})\?transport=(tcp|udp)'
+TURN_URI_REGEX = \
+    r'(stun:(.*):([0-9]{4}))|(turn:(.*):([0-9]{4})\?transport=(tcp|udp))'
 
 
 @dataclass
@@ -43,8 +44,9 @@ class TurnConfiguration:
         """Generate URIs after object initialization if necessary."""
         if self.domain and not self.uris:
             self.uris = [
-                f'{typ}:{self.domain}:3478?transport={transport}'
-                for typ in ['stun', 'turn'] for transport in ['tcp', 'udp']
+                f'stun:{self.domain}:3478',
+                f'turn:{self.domain}:3478?transport=tcp',
+                f'turn:{self.domain}:3478?transport=udp'
             ]
 
     def to_json(self) -> str:
@@ -59,7 +61,7 @@ class TurnConfiguration:
     def validate_turn_uris(turn_uris: list[str]) -> bool:
         """Return whether the given TURN URI is valid."""
         pattern = re.compile(TURN_URI_REGEX)
-        return all(map(pattern.match, turn_uris))
+        return all(map(pattern.fullmatch, turn_uris))
 
 
 @dataclass
diff --git a/plinth/modules/coturn/forms.py b/plinth/modules/coturn/forms.py
index e57740c1c..0f6f93608 100644
--- a/plinth/modules/coturn/forms.py
+++ b/plinth/modules/coturn/forms.py
@@ -18,7 +18,8 @@ def get_domain_choices():
 
 def turn_uris_validator(turn_uris):
     """Validate list of STUN/TURN Server URIs."""
-    if not TurnConfiguration.validate_turn_uris(turn_uris.split("\n")):
+    uris = [uri for uri in turn_uris.split('\r\n') if uri]
+    if not TurnConfiguration.validate_turn_uris(uris):
         raise ValidationError(_('Invalid list of STUN/TURN Server URIs'))
 
 
diff --git a/plinth/modules/coturn/tests/test_components.py b/plinth/modules/coturn/tests/test_components.py
index bf7678888..524cad258 100644
--- a/plinth/modules/coturn/tests/test_components.py
+++ b/plinth/modules/coturn/tests/test_components.py
@@ -3,6 +3,7 @@
 Tests for the Coturn app component.
 """
 
+import json
 from unittest.mock import call, patch
 
 import pytest
@@ -26,16 +27,15 @@ def fixture_empty_component_list():
     TurnConsumer._all = {}
 
 
-def test_configuration_init():
+def test_turn_configuration_init():
     """Test creating configuration object."""
     config = TurnConfiguration('test-domain.example', [], 'test-shared-secret')
     assert config.domain == 'test-domain.example'
     assert config.shared_secret == 'test-shared-secret'
     assert config.uris == [
-        "stun:test-domain.example:3478?transport=tcp",
-        "stun:test-domain.example:3478?transport=udp",
-        "turn:test-domain.example:3478?transport=tcp",
-        "turn:test-domain.example:3478?transport=udp",
+        'stun:test-domain.example:3478',
+        'turn:test-domain.example:3478?transport=tcp',
+        'turn:test-domain.example:3478?transport=udp',
     ]
 
     config = TurnConfiguration(None, ['test-uri1', 'test-uri2'],
@@ -59,6 +59,42 @@ def test_configuration_init():
     assert config.credential == 'test-credential'
 
 
+def test_turn_configuration_to_json():
+    """Test exporting configuration to JSON."""
+    config = TurnConfiguration('test-domain.example', [], 'test-shared-secret')
+    assert json.loads(config.to_json()) == {
+        'domain': 'test-domain.example',
+        'uris': [
+            'stun:test-domain.example:3478',
+            'turn:test-domain.example:3478?transport=tcp',
+            'turn:test-domain.example:3478?transport=udp',
+        ],
+        'shared_secret': 'test-shared-secret'
+    }
+
+
+def test_turn_configuration_validate_turn_uris():
+    """Test validation method to check for STUN/TURN URIs."""
+    valid_uris = [
+        'stun:test-domain.example:3478',
+        'turn:test-domain.example:3478?transport=tcp',
+        'turn:test-domain.example:3478?transport=udp',
+    ]
+    invalid_uris = [
+        'x-invalid-uri',
+        'stun:',
+        'stun:domain-port-missing.example',
+        'stun:testing.example:1234invalid-append',
+        'turn:testing.example:1234',
+        'turn:testing.example:1234?invalid-param=value',
+        'turn:testing.example:1234?transport=invalid-value',
+        'turn:testing.example:1234?transport=tcp-invalid-append',
+    ]
+    assert TurnConfiguration().validate_turn_uris(valid_uris)
+    for uri in invalid_uris:
+        assert not TurnConfiguration().validate_turn_uris([uri])
+
+
 def test_component_init_and_list():
     """Test initializing and listing all the components."""
     component1 = TurnConsumer('component1')