diff --git a/tests/test_wave_sim.py b/tests/test_wave_sim.py
index 996ca54..6615a70 100644
--- a/tests/test_wave_sim.py
+++ b/tests/test_wave_sim.py
@@ -51,10 +51,10 @@ def test_nand_delays():
     # SDF specifies IOPATH delays with respect to output polarity
     # SDF pulse rejection value is determined by IOPATH causing last transition and polarity of last transition
     delays = np.zeros((1, 5, 2, 2))
-    delays[0, 0, 0, 0] = 0.1  # A -> Z rise delay
-    delays[0, 0, 0, 1] = 0.2  # A -> Z fall delay
-    delays[0, 0, 1, 0] = 0.1  # A -> Z negative pulse limit (terminate in rising Z)
-    delays[0, 0, 1, 1] = 0.2  # A -> Z positive pulse limit
+    delays[0, 0, 0, 0] = 0.1  # A rise -> Z rise
+    delays[0, 0, 0, 1] = 0.2  # A rise -> Z fall
+    delays[0, 0, 1, 0] = 0.1  # A fall -> Z rise
+    delays[0, 0, 1, 1] = 0.2  # A fall -> Z fall
     delays[0, 1, :, 0] = 0.3  # as above for B -> Z
     delays[0, 1, :, 1] = 0.4
     delays[0, 2, :, 0] = 0.5  # as above for C -> Z