diff --git a/tests/test_vlasov1d/test_config_regression/fokker_planck_conservation_array_config.yml b/tests/test_vlasov1d/test_config_regression/fokker_planck_conservation_array_config.yml
index 9539860e..11586781 100644
--- a/tests/test_vlasov1d/test_config_regression/fokker_planck_conservation_array_config.yml
+++ b/tests/test_vlasov1d/test_config_regression/fokker_planck_conservation_array_config.yml
@@ -16505,6 +16505,7 @@ grid:
       - 6.38125
       - 6.39375
       vmax: 6.4
+      vmin: -6.4
   species_params:
     electron:
       T0: 1.0
diff --git a/tests/test_vlasov1d/test_config_regression/multispecies_ion_acoustic_array_config.yml b/tests/test_vlasov1d/test_config_regression/multispecies_ion_acoustic_array_config.yml
index e899d7fa..204f8142 100644
--- a/tests/test_vlasov1d/test_config_regression/multispecies_ion_acoustic_array_config.yml
+++ b/tests/test_vlasov1d/test_config_regression/multispecies_ion_acoustic_array_config.yml
@@ -27674,6 +27674,7 @@ grid:
       - 6.3625
       - 6.3875
       vmax: 6.4
+      vmin: -6.4
     ion:
       dv: 3.90625e-05
       kv:
@@ -28709,6 +28710,7 @@ grid:
       - 0.00494140625
       - 0.00498046875
       vmax: 0.005
+      vmin: -0.005
   species_params:
     electron:
       T0: 1.0
diff --git a/tests/test_vlasov1d/test_config_regression/resonance_array_config.yml b/tests/test_vlasov1d/test_config_regression/resonance_array_config.yml
index 0924eec1..63319fe0 100644
--- a/tests/test_vlasov1d/test_config_regression/resonance_array_config.yml
+++ b/tests/test_vlasov1d/test_config_regression/resonance_array_config.yml
@@ -20745,6 +20745,7 @@ grid:
       - 6.3625
       - 6.3875
       vmax: 6.4
+      vmin: -6.4
   species_params:
     electron:
       T0: 1.0