diff --git a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-agg-reference.png b/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-agg-reference.png
deleted file mode 100644
index 7eb8c5dc..00000000
Binary files a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-agg-reference.png and /dev/null differ
diff --git a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-cairo-reference.png b/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-cairo-reference.png
deleted file mode 100644
index 7eb8c5dc..00000000
Binary files a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-cairo-reference.png and /dev/null differ
diff --git a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-grid-reference.png b/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-grid-reference.png
deleted file mode 100644
index 4fe9ab37..00000000
Binary files a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-grid-reference.png and /dev/null differ
diff --git a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-svg-reference.svg b/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-svg-reference.svg
deleted file mode 100644
index e73d58cd..00000000
--- a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-1.0-svg-reference.svg
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg width="256px" height="256px" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape">
-<g id="dataraster" inkscape:groupmode="layer" inkscape:label="dataraster">
-</g>
-</svg>
\ No newline at end of file
diff --git a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-agg-reference.png b/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-agg-reference.png
deleted file mode 100644
index 7eb8c5dc..00000000
Binary files a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-agg-reference.png and /dev/null differ
diff --git a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-cairo-reference.png b/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-cairo-reference.png
deleted file mode 100644
index 7eb8c5dc..00000000
Binary files a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-cairo-reference.png and /dev/null differ
diff --git a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-grid-reference.png b/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-grid-reference.png
deleted file mode 100644
index 4fe9ab37..00000000
Binary files a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-grid-reference.png and /dev/null differ
diff --git a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-svg-reference.svg b/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-svg-reference.svg
deleted file mode 100644
index e73d58cd..00000000
--- a/images/gdal-overview-bilinear-scaling-filter-factor-256-256-2.0-svg-reference.svg
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg width="256px" height="256px" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape">
-<g id="dataraster" inkscape:groupmode="layer" inkscape:label="dataraster">
-</g>
-</svg>
\ No newline at end of file
diff --git a/styles/gdal-overview-bilinear-scaling-filter-factor.xml b/styles/gdal-overview-bilinear-scaling-filter-factor.xml
deleted file mode 100644
index d2012d23..00000000
--- a/styles/gdal-overview-bilinear-scaling-filter-factor.xml
+++ /dev/null
@@ -1,23 +0,0 @@
-<Map>
-    <Parameters>
-        <Parameter name="sizes">256,256</Parameter>
-    </Parameters>
-
-    <Style name="raster">
-        <Rule>
-            <!--
-            This test must not render from given overviews as billinear scaling
-            is using filter-factor 2.0 by default.
-            -->
-            <RasterSymbolizer scaling="bilinear" />
-        </Rule>
-    </Style>
-
-    <Layer name="dataraster">
-        <StyleName>raster</StyleName>
-        <Datasource>
-            <Parameter name="file">../../data/tiff/overview-test.tif</Parameter>
-            <Parameter name="type">gdal</Parameter>
-        </Datasource>
-    </Layer>
-</Map>