diff --git a/pydantic_ai_slim/pydantic_ai/_utils.py b/pydantic_ai_slim/pydantic_ai/_utils.py
index 6fc8a080ec..5fe66d0b50 100644
--- a/pydantic_ai_slim/pydantic_ai/_utils.py
+++ b/pydantic_ai_slim/pydantic_ai/_utils.py
@@ -461,12 +461,10 @@ def validate_empty_kwargs(_kwargs: dict[str, Any]) -> None:
 def strip_markdown_fences(text: str) -> str:
     if text.startswith('{'):
         return text
-
-    regex = r'```(?:\w+)?\n(\{.*\})\n```'
+    regex = r'```(?:\w+)?\s*(\{.*\})\s*```'
     match = re.search(regex, text, re.DOTALL)
     if match:
-        return match.group(1)
-
+        return match.group(1).strip()
     return text
 
 
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 4ffbb64832..2bbd20ea5b 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -505,6 +505,15 @@ def test_strip_markdown_fences():
     )
     assert strip_markdown_fences('No JSON to be found') == 'No JSON to be found'
 
+    assert strip_markdown_fences('```json {"foo": "bar"}```') == '{"foo": "bar"}'
+    assert strip_markdown_fences('```json\n\n{"foo": "bar"}\n\n```') == '{"foo": "bar"}'
+    assert strip_markdown_fences('```\n{"foo": "bar"}```') == '{"foo": "bar"}'
+    assert strip_markdown_fences('```json  \n{"foo": "bar"}\n  ```') == '{"foo": "bar"}'
+    assert (
+        strip_markdown_fences('```json\n{"foo": "bar"}\n```\nSome text\n```json\n{"baz": "qux"}\n```')
+        == '{"foo": "bar"}\n```\nSome text\n```json\n{"baz": "qux"}'
+    )
+
 
 def test_validate_empty_kwargs_empty():
     """Test that empty dict passes validation."""