diff --git a/pyproject.toml b/pyproject.toml
index f66d7f1..6039d1f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "scgenerator"
-version = "0.3.22"
+version = "0.3.23"
 description = "Simulate nonlinear pulse propagation in optical fibers"
 readme = "README.md"
 authors = [{ name = "Benoit Sierro", email = "benoit.sierro@iap.unibe.ch" }]
diff --git a/src/scgenerator/plotting.py b/src/scgenerator/plotting.py
index f51683e..05e4d4b 100644
--- a/src/scgenerator/plotting.py
+++ b/src/scgenerator/plotting.py
@@ -1168,7 +1168,7 @@ def summary_plot(
     axes: tuple[Axes, Axes] | None = None,
     wl_db="1D",
     time_db=False,
-    cmap: str | matplotlib.colors.LinearSegmentedColormap = "viridis",
+    cmap: str | matplotlib.colors.LinearSegmentedColormap = None,
 ):
     wl_int = specs.wl_int
     time_int = specs.time_int
diff --git a/tests/test_integrator.py b/tests/test_integrator.py
index 5e1c02d..3073839 100644
--- a/tests/test_integrator.py
+++ b/tests/test_integrator.py
@@ -29,7 +29,7 @@ def test_rk43_soliton(plot=False):
     n = 1024
     l0 = 835e-9
     w0 = sc.units.m(l0)
-    b2 = sc.fiber.D_to_beta2(sc.units.D_ps_nm_km(24), l0)
+    b2 = sc.fiber.dispersion_parameter_to_beta2(sc.units.D_ps_nm_km(24), l0)
     gamma = 0.08
     t0_fwhm = 50e-15
     p0 = 1.26e3