diff --git a/preset/classical-ml/tests/modin/modin_quickstart.py b/preset/classical-ml/tests/modin/modin_quickstart.py
index aaa6ea5bb..13e53702d 100644
--- a/preset/classical-ml/tests/modin/modin_quickstart.py
+++ b/preset/classical-ml/tests/modin/modin_quickstart.py
@@ -62,7 +62,7 @@
 # # Faster Append with Modin's ``concat``
 
 
-N_copies = 100
+N_copies = 20  # duplicate the same taxi dataset
 start = time.time()
 
 big_pandas_df = pandas.concat([pandas_df for _ in range(N_copies)])
diff --git a/preset/data-analytics/tests/modin/modin_quickstart.py b/preset/data-analytics/tests/modin/modin_quickstart.py
index aaa6ea5bb..b37a8a0a8 100644
--- a/preset/data-analytics/tests/modin/modin_quickstart.py
+++ b/preset/data-analytics/tests/modin/modin_quickstart.py
@@ -62,7 +62,7 @@
 # # Faster Append with Modin's ``concat``
 
 
-N_copies = 100
+N_copies = 20
 start = time.time()
 
 big_pandas_df = pandas.concat([pandas_df for _ in range(N_copies)])