diff --git a/guide/src/free-threading.md b/guide/src/free-threading.md
index 7f43f265490..77b2ff327a2 100644
--- a/guide/src/free-threading.md
+++ b/guide/src/free-threading.md
@@ -100,7 +100,7 @@ The most straightforward way to trigger this problem to use the Python
 `pyclass`. For example, consider the following `PyClass` implementation:
 
 ```
-# use python::prelude::*;
+# use pyo3::prelude::*;
 # fn main() {
 #[pyclass]
 #[derive(Default)]
@@ -119,12 +119,13 @@ impl ThreadIter {
         self.count += 1;
         self.count
     }
+}
 # }
 ```
 
 And then if we do something like this in Python:
 
-```
+```python
 import concurrent.futures
 from my_module import ThreadIter
 
@@ -140,7 +141,7 @@ with concurrent.futures.ThreadPoolExecutor(max_workers=16) as tpe:
 
 We will see an exception:
 
-```
+```text
 Traceback (most recent call last)
   File "example.py", line 5, in <module>
     next(i)
diff --git a/src/lib.rs b/src/lib.rs
index 7de32ca264f..247b42ac372 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -501,6 +501,7 @@ pub mod doc_test {
         "guide/src/exception.md" => guide_exception_md,
         "guide/src/faq.md" => guide_faq_md,
         "guide/src/features.md" => guide_features_md,
+        "guide/src/free-threading.md" => guide_free_threading_md,
         "guide/src/function.md" => guide_function_md,
         "guide/src/function/error-handling.md" => guide_function_error_handling_md,
         "guide/src/function/signature.md" => guide_function_signature_md,