diff --git a/binding/python/bench_test.py b/binding/python/bench_test.py
index 9542a1f..22abca6 100644
--- a/binding/python/bench_test.py
+++ b/binding/python/bench_test.py
@@ -96,8 +96,8 @@ def run_bench_test(db_path: str, src_path: str, cache_policy: str):
         return
 
     # print the stats info
-    each_ms = total_secs * 1000 / count
-    print(f"Bench finished, {{cachePolicy: {cache_policy}, total: {count}, took: {total_secs:.3f} s, cost: {each_ms:.3f} ms/op}}");
+    each_us = total_secs * 1000_000 / count
+    print(f"Bench finished, {{cachePolicy: {cache_policy}, total: {count}, took: {total_secs:.3f} s, cost: {each_us:.0f} μs/op}}");
 
     # resource cleanup
     searcher.close()
diff --git a/binding/python/search_test.py b/binding/python/search_test.py
index 56dc5b6..650780c 100644
--- a/binding/python/search_test.py
+++ b/binding/python/search_test.py
@@ -82,8 +82,8 @@ type 'quit' to exit'''.format(db_path, searcher.get_ip_version().name, cache_pol
             print("failed to search({}): {}".format(util.ip_to_string(ip_bytes), str(e)))
             continue
 
-        took = (time.time() - s_time) * 1000
-        print(f"{{region: {region}, ioCount: {searcher.get_io_count()}, took: {took:.3f} ms}}");
+        took = (time.time() - s_time) * 1000_000
+        print(f"{{region: {region}, ioCount: {searcher.get_io_count()}, took: {took:.0f} μs}}");
 
     # close the searcher
     searcher.close()