diff --git a/gtk/resources/theme/Adwaita/_common.scss b/gtk/resources/theme/Adwaita/_common.scss
index 80820b11b9..a972bbc2b4 100644
--- a/gtk/resources/theme/Adwaita/_common.scss
+++ b/gtk/resources/theme/Adwaita/_common.scss
@@ -1218,9 +1218,12 @@ GtkCheckButton.text-button:selected { background-color: transparent; }
   -GtkRange-slider-width: 20;
   -GtkRange-trough-border: 2;
   outline-offset: -9px;
+  outline-radius: 4px;
   margin: 10px;
   &.fine-tune {
     margin: 8px;
+    outline-offset: -7px;
+    outline-radius: 6px;
     &.trough { border-radius: 4px; }
   }
   &.slider {
diff --git a/gtk/resources/theme/Adwaita/gtk-contained-dark.css b/gtk/resources/theme/Adwaita/gtk-contained-dark.css
index 9f80950714..9868b8734f 100644
--- a/gtk/resources/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/resources/theme/Adwaita/gtk-contained-dark.css
@@ -1546,11 +1546,14 @@ GtkCheckButton.text-button:selected {
   -GtkRange-slider-width: 20;
   -GtkRange-trough-border: 2;
   outline-offset: -9px;
+  outline-radius: 4px;
   margin: 10px; }
   .scale.fine-tune,
   .scale.scale-has-marks-above.scale-has-marks-below.fine-tune,
   .scale.vertical.scale-has-marks-above.scale-has-marks-below.fine-tune {
-    margin: 8px; }
+    margin: 8px;
+    outline-offset: -7px;
+    outline-radius: 6px; }
     .scale.fine-tune.trough,
     .scale.scale-has-marks-above.scale-has-marks-below.fine-tune.trough,
     .scale.vertical.scale-has-marks-above.scale-has-marks-below.fine-tune.trough {
diff --git a/gtk/resources/theme/Adwaita/gtk-contained.css b/gtk/resources/theme/Adwaita/gtk-contained.css
index 4c49b0fa8e..28dbaa1499 100644
--- a/gtk/resources/theme/Adwaita/gtk-contained.css
+++ b/gtk/resources/theme/Adwaita/gtk-contained.css
@@ -1545,11 +1545,14 @@ GtkCheckButton.text-button:selected {
   -GtkRange-slider-width: 20;
   -GtkRange-trough-border: 2;
   outline-offset: -9px;
+  outline-radius: 4px;
   margin: 10px; }
   .scale.fine-tune,
   .scale.scale-has-marks-above.scale-has-marks-below.fine-tune,
   .scale.vertical.scale-has-marks-above.scale-has-marks-below.fine-tune {
-    margin: 8px; }
+    margin: 8px;
+    outline-offset: -7px;
+    outline-radius: 6px; }
     .scale.fine-tune.trough,
     .scale.scale-has-marks-above.scale-has-marks-below.fine-tune.trough,
     .scale.vertical.scale-has-marks-above.scale-has-marks-below.fine-tune.trough {