diff --git a/basis/images/png/png-tests.factor b/basis/images/png/png-tests.factor
index 858718e63f..25815c7017 100644
--- a/basis/images/png/png-tests.factor
+++ b/basis/images/png/png-tests.factor
@@ -7,6 +7,11 @@ IN: images.png.tests
 
 ! The subset of the suite that should work given the current implementation.
 "vocab:images/testing/png" [
+    "basn0g01.png" decode-test
+    "basn0g02.png" decode-test
+    "basn0g04.png" decode-test
+    "basn0g08.png" decode-test
+    "basn0g16.png" decode-test
     "basn2c08.png" decode-test
     "basn6a08.png" decode-test
     "f00n2c08.png" decode-test
diff --git a/basis/images/png/png.factor b/basis/images/png/png.factor
index 6e8d7a6c1e..2135d3fc96 100644
--- a/basis/images/png/png.factor
+++ b/basis/images/png/png.factor
@@ -240,7 +240,7 @@ ERROR: unknown-component-type n ;
 : scale-factor ( n -- n' )
     {
         { 1 [ 255 ] }
-        { 2 [ 127 ] }
+        { 2 [ 85 ] }
         { 4 [ 17 ] }
     } case ;
 
diff --git a/extra/images/testing/png/basn0g01.fig b/extra/images/testing/png/basn0g01.fig
new file mode 100644
index 0000000000..d79f71b469
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diff --git a/extra/images/testing/png/basn0g01.png b/extra/images/testing/png/basn0g01.png
new file mode 100644
index 0000000000..1d722423aa
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diff --git a/extra/images/testing/png/basn0g02.fig b/extra/images/testing/png/basn0g02.fig
new file mode 100644
index 0000000000..3953ef55c1
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diff --git a/extra/images/testing/png/basn0g02.png b/extra/images/testing/png/basn0g02.png
new file mode 100644
index 0000000000..508332418f
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diff --git a/extra/images/testing/png/basn0g04.fig b/extra/images/testing/png/basn0g04.fig
new file mode 100644
index 0000000000..1e45ed142b
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diff --git a/extra/images/testing/png/basn0g04.png b/extra/images/testing/png/basn0g04.png
new file mode 100644
index 0000000000..0bf3687863
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diff --git a/extra/images/testing/png/basn0g08.fig b/extra/images/testing/png/basn0g08.fig
new file mode 100644
index 0000000000..d185701c27
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diff --git a/extra/images/testing/png/basn0g08.png b/extra/images/testing/png/basn0g08.png
new file mode 100644
index 0000000000..23c82379a2
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diff --git a/extra/images/testing/png/basn0g16.fig b/extra/images/testing/png/basn0g16.fig
new file mode 100644
index 0000000000..7218acd3b1
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diff --git a/extra/images/testing/png/basn0g16.png b/extra/images/testing/png/basn0g16.png
new file mode 100644
index 0000000000..e7c82f78eb
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