diff --git a/tests/test_depletion_approximation.py b/tests/test_depletion_approximation.py
index 308edf22..1e119e89 100644
--- a/tests/test_depletion_approximation.py
+++ b/tests/test_depletion_approximation.py
@@ -238,7 +238,7 @@ def bc(ya, yb):
     guess = minority * np.ones((2, zz.size))
     guess[1] = np.zeros_like(guess[0])
 
-    solution = solve_bvp(fun, bc, zz, guess)
+    solution = solve_bvp(fun, bc, zz, guess, max_nodes=2 * zz.shape[0])
 
     expected = solution.y[1][-1]
 
@@ -299,7 +299,7 @@ def bc(ya, yb):
     guess = minority * np.ones((2, zz.size))
     guess[1] = np.zeros_like(guess[0])
 
-    solution = solve_bvp(fun, bc, zz, guess)
+    solution = solve_bvp(fun, bc, zz, guess, max_nodes=2 * zz.shape[0])
 
     expected = solution.y[1][0]