diff --git a/test/usecases/cvode/derivative.mod b/test/usecases/cvode/derivative.mod
index 70aa20352..d3715352f 100644
--- a/test/usecases/cvode/derivative.mod
+++ b/test/usecases/cvode/derivative.mod
@@ -12,20 +12,14 @@ PARAMETER {
     v5 = 0.3
     r = 3
     k = 0.2
-    nmodl_alpha = 1.2
-    nmodl_beta = 4.5
-    nmodl_gamma = 2.4
-    nmodl_delta = 7.5
 }
 
-STATE {var1 var2 var3 var4 var5}
+STATE {var1 var2 var3}
 
 INITIAL {
     var1 = v1
     var2 = v2
     var3 = v3
-    var4 = v4
-    var5 = v5
 }
 
 BREAKPOINT {
@@ -40,7 +34,4 @@ DERIVATIVE equation {
     var2' = -var2 * a
     : logistic ODE
     var3' = r * var3 * (1 - var3 / k)
-    : system of 2 ODEs (predator-prey model)
-    var4' = nmodl_alpha * var4 - nmodl_beta * var4 * var5
-    var5' = nmodl_delta * var4 * var5 - nmodl_gamma * var5
 }
diff --git a/test/usecases/cvode/test_cvode.py b/test/usecases/cvode/test_cvode.py
index 521b93f67..c5ae18cc3 100644
--- a/test/usecases/cvode/test_cvode.py
+++ b/test/usecases/cvode/test_cvode.py
@@ -50,8 +50,3 @@ def simulate(rtol):
 
 if __name__ == "__main__":
     t, *x = simulate(rtol=1e-5)
-    # import matplotlib.pyplot as plt
-    # fig, ax = plt.subplots(nrows=len(x))
-    # for a, val in zip(ax, x):
-    #    a.plot(t, val, ls="", marker="x", markersize=0.1)
-    # plt.show()