diff --git a/tests/bad_iccp.png b/tests/bad_iccp.png
new file mode 100644
index 000000000..0b7b86379
Binary files /dev/null and b/tests/bad_iccp.png differ
diff --git a/tests/empty_ancillary_chunks.png b/tests/empty_ancillary_chunks.png
new file mode 100644
index 000000000..d76477c6a
Binary files /dev/null and b/tests/empty_ancillary_chunks.png differ
diff --git a/tests/huge_idat.png b/tests/huge_idat.png
new file mode 100644
index 000000000..efee66cf3
Binary files /dev/null and b/tests/huge_idat.png differ
diff --git a/tests/pngtest b/tests/pngtest
index d33f93616..942e8c251 100755
--- a/tests/pngtest
+++ b/tests/pngtest
@@ -1,4 +1,7 @@
 #!/bin/sh
 ./pngtest --relaxed ${srcdir}/tests/badcrc.png
 ./pngtest --relaxed ${srcdir}/tests/badadler.png
+./pngtest --relaxed ${srcdir}/tests/bad_iccp.png
+./pngtest --relaxed ${srcdir}/tests/huge_idat.png
+./pngtest --relaxed ${srcdir}/tests/empty_ancillary_chunks.png
 exec ./pngtest --strict ${srcdir}/pngtest.png