diff --git a/protovalidate/internal/extra_func.py b/protovalidate/internal/extra_func.py
index c6cb19d5..ae2b02c0 100644
--- a/protovalidate/internal/extra_func.py
+++ b/protovalidate/internal/extra_func.py
@@ -677,7 +677,9 @@ def __address_part(self) -> bool:
 
             break
 
-        return self._double_colon_seen or len(self._pieces) == 8
+        if self._double_colon_seen:
+            return len(self._pieces) < 8
+        return len(self._pieces) == 8
 
     def __zone_id(self) -> bool:
         """Determine whether the current position is a zoneID.
diff --git a/protovalidate/internal/string_format.py b/protovalidate/internal/string_format.py
index b6b1338d..9353ccf9 100644
--- a/protovalidate/internal/string_format.py
+++ b/protovalidate/internal/string_format.py
@@ -158,7 +158,7 @@ def format_string(self, arg: celtypes.Value) -> celpy.Result:
             # True -> true
             return celtypes.StringType(str(arg).lower())
         if isinstance(arg, celtypes.DoubleType):
-            return celtypes.StringType(f"{arg:.0f}")
+            return celtypes.StringType(f"{arg:g}")
         if isinstance(arg, celtypes.DurationType):
             return celtypes.StringType(self._format_duration(arg))
         if isinstance(arg, celtypes.TimestampType):
@@ -168,23 +168,12 @@ def format_string(self, arg: celtypes.Value) -> celpy.Result:
             return celtypes.StringType(base.removesuffix("+00:00") + "Z")
         return celtypes.StringType(arg)
 
-    def format_value(self, arg: celtypes.Value) -> celpy.Result:
-        if isinstance(arg, (celtypes.StringType, str)):
-            return celtypes.StringType(quote(arg))
-        if isinstance(arg, celtypes.UintType):
-            return celtypes.StringType(arg)
-        if isinstance(arg, celtypes.DurationType):
-            return celtypes.StringType(f'duration("{self._format_duration(arg)}")')
-        if isinstance(arg, celtypes.DoubleType):
-            return celtypes.StringType(f"{arg:f}")
-        return self.format_string(arg)
-
     def format_list(self, arg: celtypes.ListType) -> celpy.Result:
         result = "["
         for i in range(len(arg)):
             if i > 0:
                 result += ", "
-            result += self.format_value(arg[i])
+            result += self.format_string(arg[i])
         result += "]"
         return celtypes.StringType(result)
 
diff --git a/tests/conformance/nonconforming.yaml b/tests/conformance/nonconforming.yaml
index 9a014fb4..b46684df 100644
--- a/tests/conformance/nonconforming.yaml
+++ b/tests/conformance/nonconforming.yaml
@@ -3,22 +3,7 @@
 standard_rules/well_known_types/duration:
  - gte_lte/invalid/above
  - lte/invalid
- - in/invalid
  - not in/valid
- - not in/invalid
 standard_rules/well_known_types/timestamp:
  - gte_lte/invalid/above
  - lte/invalid
-kitchen_sink:
- - field/embedded/invalid
- - field/transitive/invalid
- - many/all-non-message-fields/invalid
- - field/invalid
-standard_rules/repeated:
- - items/in/invalid
- - items/not_in/invalid
-library/is_ip:
- - version/6/invalid/ipv6/7h16_double_colon_1h16
- - version/6/invalid/ipv6/7h16_double_colon
- - version/6/invalid/ipv6/double_colon_8h16
- - version/6/invalid/ipv6/1h16_double_colon_7h16