diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 2feddb4946..57d933abd3 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -980,8 +980,6 @@ GtkComboBox {
   -GtkComboBox-arrow-scaling: 0.5;
   -GtkComboBox-shadow-type: none;
 
-  box-shadow: 0 1px $borders_edge;
-
   @include _button_text_shadow;
 
   &:insensitive {
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index b7a7517bb2..6a0e1e8cc7 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -1461,7 +1461,6 @@ GtkTreeView .spinbutton.entry, GtkTreeView .spinbutton.entry:focus {
 GtkComboBox {
   -GtkComboBox-arrow-scaling: 0.5;
   -GtkComboBox-shadow-type: none;
-  box-shadow: 0 1px rgba(238, 238, 236, 0.1);
   text-shadow: 0 -1px rgba(0, 0, 0, 0.81176);
   icon-shadow: 0 -1px rgba(0, 0, 0, 0.81176); }
   GtkComboBox > .the-button-in-the-combobox {
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index 5decfdfd8b..c829f99cab 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -1461,7 +1461,6 @@ GtkTreeView .spinbutton.entry, GtkTreeView .spinbutton.entry:focus {
 GtkComboBox {
   -GtkComboBox-arrow-scaling: 0.5;
   -GtkComboBox-shadow-type: none;
-  box-shadow: 0 1px white;
   text-shadow: 0 1px rgba(255, 255, 255, 0.76923);
   icon-shadow: 0 1px rgba(255, 255, 255, 0.76923); }
   GtkComboBox > .the-button-in-the-combobox {