diff --git a/reframe/frontend/reporting/__init__.py b/reframe/frontend/reporting/__init__.py
index 6e40761f8..0d8e469ea 100644
--- a/reframe/frontend/reporting/__init__.py
+++ b/reframe/frontend/reporting/__init__.py
@@ -31,7 +31,8 @@
 from reframe.core.warnings import suppress_deprecations
 from reframe.utility import nodelist_abbrev, nodelist_expand, OrderedSet
 from .storage import StorageBackend
-from .utility import Aggregator, parse_cmp_spec, parse_query_spec
+from .utility import (Aggregator, parse_cmp_spec,
+                      parse_query_spec, parse_time_period)
 
 # The schema data version
 # Major version bumps are expected to break the validation of previous schemas