diff --git a/tests/test-tokenizer-0-bpe.py b/tests/test-tokenizer-0-bpe.py
index b1cf43b50..d412ce039 100644
--- a/tests/test-tokenizer-0-bpe.py
+++ b/tests/test-tokenizer-0-bpe.py
@@ -1,4 +1,11 @@
 # tests with BPE tokenizer
+#
+# sample usage:
+#
+#   python3 tests/test-tokenizer-0-bpe.py ~/Data/huggingface/Meta-Llama-3-8B-Instruct/
+#   python3 tests/test-tokenizer-0-bpe.py ~/Data/huggingface/falcon-7b/
+#   python3 tests/test-tokenizer-0-bpe.py ~/Data/huggingface/deepseek-coder-6.7b-instruct/
+#
 
 import argparse
 
diff --git a/tests/test-tokenizer-0-spm.py b/tests/test-tokenizer-0-spm.py
index 6dbfd9412..f2d3b6e88 100644
--- a/tests/test-tokenizer-0-spm.py
+++ b/tests/test-tokenizer-0-spm.py
@@ -1,4 +1,11 @@
 # tests with SPM tokenizer
+#
+# sample usage:
+#
+#   python3 tests/test-tokenizer-0-spm.py ~/Data/huggingface/Llama-2-7b-hf/
+#   python3 tests/test-tokenizer-0-spm.py ~/Data/huggingface/CodeLlama-34b-Instruct-hf/
+#
+
 
 import argparse