How to reduce spacing between page headers in PageTabStrip?

Question

Android

I am using ViewPager with PageTabStrip to navigate between pages. But the distance between the headers in the standard implementation is quite large, how can it be reduced?
Here is the ViewPager code

<android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <android.support.v7.widget.AppCompatImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/image_background"/>
            <android.support.v4.view.PagerTabStrip
                android:id="@+id/pagerTabStrip"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="top"
                android:background="@color/yellow"
                android:paddingTop="8dp"
                android:paddingBottom="8dp">
            </android.support.v4.view.PagerTabStrip>
    </android.support.v4.view.ViewPager>