diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 7673b79f792f..a4b697255699 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -40,7 +40,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.8, 3.9, "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11","3.12"]
         pytorch-channel: [pytorch, pytorch-nightly]
         include:
           # includes a single build on windows
diff --git a/examples/mnist/mnist.py b/examples/mnist/mnist.py
index 05c0a34bd2b3..8fb5a2c4ac6a 100644
--- a/examples/mnist/mnist.py
+++ b/examples/mnist/mnist.py
@@ -96,7 +96,7 @@ def log_validation_results(engine):
 
     @trainer.on(Events.EPOCH_COMPLETED | Events.COMPLETED)
     def log_time(engine):
-        tqdm.write(f"{trainer.last_event_name.name} took { trainer.state.times[trainer.last_event_name.name]} seconds")
+        tqdm.write(f"{trainer.last_event_name.name} took {trainer.state.times[trainer.last_event_name.name]} seconds")
 
     trainer.run(train_loader, max_epochs=epochs)
     pbar.close()
diff --git a/requirements-dev.txt b/requirements-dev.txt
index fb93bc61c486..bd5aca1f411c 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -23,7 +23,9 @@ pynvml
 clearml
 scikit-image
 py-rouge
-nltk
+# temporary fix for python=3.12 and v3.8.1
+# nltk
+git+https://github.com/nltk/nltk
 # Examples dependencies
 pandas
 gymnasium