diff --git a/test/test_codegen.py b/test/test_codegen.py
index fb1655986bb2ffa6b69cd6c1bd86bd5de594e342..0a02b6b4c39d9223380555bb705b9227ed1caf17 100644
--- a/test/test_codegen.py
+++ b/test/test_codegen.py
@@ -91,7 +91,7 @@ def test_line_taylor_coeff_growth():
     expn = LineTaylorLocalExpansion(LaplaceKernel(2), order)
     avec = make_sym_vector("a", 2)
     bvec = make_sym_vector("b", 2)
-    coeffs = expn.coefficients_from_source(avec, bvec)
+    coeffs = expn.coefficients_from_source(avec, bvec, rscale=1)
 
     sym2pymbolic = SympyToPymbolicMapper()
     coeffs_pymbolic = [sym2pymbolic(c) for c in coeffs]