diff --git a/cara/tests/apps/calculator/test_model_generator.py b/cara/tests/apps/calculator/test_model_generator.py
index 05203273..a13018cc 100644
--- a/cara/tests/apps/calculator/test_model_generator.py
+++ b/cara/tests/apps/calculator/test_model_generator.py
@@ -23,3 +23,15 @@ def test_ventilation(baseline_form):
     ventilation = baseline_form.ventilation()
     # TODO:
     # assert ventilation == cara.models.Ventilation()
+
+
+def test_present_intervals(baseline_form):
+    baseline_form.coffee_duration = 15
+    baseline_form.coffee_option = True
+    baseline_form.coffee_breaks = 4
+    baseline_form.activity_start = 9 * 60
+    baseline_form.activity_finish = 17 * 60
+    baseline_form.lunch_start = 12 * 60 + 30
+    baseline_form.lunch_finish = 13 * 60 + 30
+    correct = ((9, 10), (10.25, 12), (12.25, 12.5), (13.5, 14), (14.25, 16), (16.25, 17))
+    assert baseline_form.present_interval().present_times == correct