diff --git a/backend/tests/README b/backend/tests/README
index 541b9f5d..f234a788 100644
--- a/backend/tests/README
+++ b/backend/tests/README
@@ -6,7 +6,7 @@ To make, first make libzint with ZINT_TEST defined:
   cd <project-dir>
   mkdir build
   cd build
-  cmake -DZINT_TEST:BOOL:1 ..
+  cmake -DZINT_TEST:BOOL=1 ..
   make
 
 Then make the tests:
@@ -15,7 +15,7 @@ Then make the tests:
   cd backend/tests
   mkdir build
   cd build
-  cmake -DZINT_TEST:BOOL:1 ..
+  cmake -DZINT_TEST:BOOL=1 ..
   make
 
 (ZINT_TEST is needed to export INTERNAL functions for use and testing.)
diff --git a/backend/tests/data/print/gif/code128_aim.gif b/backend/tests/data/print/gif/code128_aim.gif
index 864a29a4..9e43e914 100644
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diff --git a/backend/tests/data/print/gif/dotcode_aim_fig7.gif b/backend/tests/data/print/gif/dotcode_aim_fig7.gif
index 2af2d621..a61fee6a 100644
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diff --git a/backend/tests/data/print/gif/qr_v1_m.gif b/backend/tests/data/print/gif/qr_v1_m.gif
index 700f8193..49cdd8cc 100644
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