Fix test cases (#837)

* Fix formatting

src/config.py

@@ -32,4 +32,4 @@ HIDDEN_COLUMNS = ["coll_level"]
 HIDDEN_COLUMNS_CLI = ["Description", "coll_level"]
 HIDDEN_SECTIONS = [400, 1900, 2000]
 
-TIME_UNITS = {"s": 10**9, "ms": 10**6, "us": 10**3, "ns": 1}
+TIME_UNITS = {"s": 10 ** 9, "ms": 10 ** 6, "us": 10 ** 3, "ns": 1}