diff --git a/Tests/Data/Notebooks/testrunner.py b/Tests/Data/Notebooks/testrunner.py
index 81324ea15284bd65df6134a797ccea559d30e5f0..f5e2da0059ec98c1c616a2df40fd339dd4264853 100644
--- a/Tests/Data/Notebooks/testrunner.py
+++ b/Tests/Data/Notebooks/testrunner.py
@@ -168,6 +168,7 @@ for notebook_file in args.notebooks:
         notebook_output_path = (Path(args.out) / _relpath).resolve()
         notebook_output_path.mkdir(parents=True, exist_ok=True)
         os.environ["OGS_TESTRUNNER_OUT_DIR"] = str(notebook_output_path)
+        os.environ["TQDM_DISABLE"] = "1"  # Disable progress bars
         notebook_filename = notebook_file_path.name
         convert_notebook_file = notebook_output_path
         if not is_jupytext: