Cannot remove Padding from Tabs when using Custom views with Tab Layout

 <android.support.design.widget.TabLayout
     android:id="@+id/tab_layout"
     android:layout_width="210dp"
     android:layout_height="28dp"
     android:layout_centerInParent="true"
     android:background="@drawable/bg_forum_tab"
     app:tabIndicatorColor="@color/colorBtnBg"
     app:tabIndicatorHeight="0dp"
     app:tabPaddingBottom="-1dp"
     app:tabPaddingEnd="-1dp"
     app:tabPaddingStart="-1dp"
     app:tabPaddingTop="-1dp"
     app:tabSelectedTextColor="@color/colorBtnBg"
     app:tabTextColor="@color/colorWhite" />

Set tabPaddingStart/tabPaddingEnd/tabPaddingTop/tabPaddingBottom like this.