diff --git a/src/test/OpenEXRTest/testBackwardCompatibility.cpp b/src/test/OpenEXRTest/testBackwardCompatibility.cpp
index 69100f7be7..93e715db25 100644
--- a/src/test/OpenEXRTest/testBackwardCompatibility.cpp
+++ b/src/test/OpenEXRTest/testBackwardCompatibility.cpp
@@ -215,6 +215,7 @@ generateScanlinePlanarImage (const char * fn)
     header.channels().insert("R", Channel(IMF::HALF));
     header.channels().insert("G", Channel(IMF::HALF));
     header.channels().insert("B", Channel(IMF::HALF));
+    header.compression()=NO_COMPRESSION;
     addUserAttributesToHeader (header);
 
     FrameBuffer fb;
@@ -243,7 +244,7 @@ generateScanlinePlanarImage (const char * fn)
 
     OutputFile file (fn, header);
     file.setFrameBuffer (fb);
-    file.writePixels (H-40);
+    file.writePixels (dod.max.y-dod.min.y+1);
 }
 
 struct RZ
@@ -271,6 +272,7 @@ generateScanlineInterleavedImage (const char * fn)
     OPENEXR_IMF_NAMESPACE::Header header = Header (W, H, dod);
     header.channels().insert("Z", Channel(IMF::FLOAT));
     header.channels().insert("R", Channel(IMF::HALF));
+    header.compression() = NO_COMPRESSION;
     addUserAttributesToHeader (header);
 
     FrameBuffer fb;
@@ -289,7 +291,7 @@ generateScanlineInterleavedImage (const char * fn)
 
     OutputFile file (fn, header);
     file.setFrameBuffer (fb);
-    file.writePixels (H-40);
+    file.writePixels (dod.max.y-dod.min.y+1);
 }
 
 void
@@ -325,6 +327,7 @@ generateTiledImage (const char * fn)
     Header header (W, H);
     header.channels().insert ("G", Channel (IMF::HALF));
     header.channels().insert ("Z", Channel (IMF::FLOAT));
+    header.compression() = NO_COMPRESSION;
 
     int tileW = 12;
     int tileH = 24;
diff --git a/src/test/OpenEXRTest/v1.7.test.interleaved.exr b/src/test/OpenEXRTest/v1.7.test.interleaved.exr
index e480b82984..af63bf941a 100644
Binary files a/src/test/OpenEXRTest/v1.7.test.interleaved.exr and b/src/test/OpenEXRTest/v1.7.test.interleaved.exr differ
diff --git a/src/test/OpenEXRTest/v1.7.test.planar.exr b/src/test/OpenEXRTest/v1.7.test.planar.exr
index b5259fff3b..f6442dbd93 100644
Binary files a/src/test/OpenEXRTest/v1.7.test.planar.exr and b/src/test/OpenEXRTest/v1.7.test.planar.exr differ
diff --git a/src/test/OpenEXRTest/v1.7.test.tiled.exr b/src/test/OpenEXRTest/v1.7.test.tiled.exr
index b1369c92f2..5ba2c12f01 100644
Binary files a/src/test/OpenEXRTest/v1.7.test.tiled.exr and b/src/test/OpenEXRTest/v1.7.test.tiled.exr differ