diff --git a/fre/app/generate_time_averages/tests/.unused_tests/test_multiply_duration.py b/fre/app/generate_time_averages/tests/.unused_tests/test_multiply_duration.py
deleted file mode 100644
index 704907b5..00000000
--- a/fre/app/generate_time_averages/tests/.unused_tests/test_multiply_duration.py
+++ /dev/null
@@ -1,17 +0,0 @@
-from fre_python_tools.utilities.multiply_duration import multiply_duration
-import metomi.isodatetime.parsers as parse
-
-def test_month():
-    '''1 month x 2 = 2 months'''
-    two_months = parse.DurationParser().parse('P2M')
-    assert multiply_duration('P1M', 2) == two_months
-
-def test_minutes():
-    '''12 minutes x 5 = 1 hour'''
-    hour = parse.DurationParser().parse('PT1H')
-    assert multiply_duration('PT12M', 5) == hour
-
-def test_fail():
-    '''10 minutes x 5 != 1 hour'''
-    hour = parse.DurationParser().parse('PT1H')
-    assert multiply_duration('PT10M', 5) != hour
diff --git a/fre/app/generate_time_averages/tests/.unused_tests/test_subtract_durations.py b/fre/app/generate_time_averages/tests/.unused_tests/test_subtract_durations.py
deleted file mode 100644
index f495745d..00000000
--- a/fre/app/generate_time_averages/tests/.unused_tests/test_subtract_durations.py
+++ /dev/null
@@ -1,17 +0,0 @@
-from fre_python_tools.utilities.subtract_durations import subtract_durations
-import metomi.isodatetime.parsers as parse
-
-def test_months():
-    '''13 months - 3 months = 10 months'''
-    ten_months = parse.DurationParser().parse('P10M')
-    assert subtract_durations('P13M', 'P3M') == ten_months
-
-def test_hour():
-    '''2 hours minus 30 minutes = 90 minutes'''
-    ninety_mins = parse.DurationParser().parse('PT90M')
-    assert subtract_durations('PT2H', 'PT30M') == ninety_mins
-
-def test_fail():
-    '''2 hours minus 60 minutes != 90 minutes'''
-    ninety_mins = parse.DurationParser().parse('PT90M')
-    assert subtract_durations('PT2H', 'PT60M') != ninety_mins