diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 494fd2b..3ff4f0b 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -6,6 +6,10 @@
     set(libs ${libs} pkcs11-helper)
 endif(USE_PKCS11_HELPER_LIBRARY)
 
+if(ENABLE_ZLIB_SUPPORT)
+    set(libs ${libs} ${ZLIB_LIBRARIES})
+endif(ENABLE_ZLIB_SUPPORT)
+
 function(add_test_suite suite_name)
     if(ARGV1)
     set(data_name ${ARGV1})