diff --git a/cmake/zint_add_test.cmake b/cmake/zint_add_test.cmake
index a0276ce8..372b34fa 100644
--- a/cmake/zint_add_test.cmake
+++ b/cmake/zint_add_test.cmake
@@ -1,4 +1,4 @@
-# Copyright (C) 2021-23 Robin Stuart <rstuart114@gmail.com>
+# Copyright (C) 2021-2024 Robin Stuart <rstuart114@gmail.com>
 # Adapted from qrencode/tests/CMakeLists.txt
 # Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
 # vim: set ts=4 sw=4 et :
@@ -8,6 +8,9 @@ macro(zint_add_test test_name test_command)
     if(ZINT_SHARED)
         add_executable(${test_command} ${test_command}.c)
         target_link_libraries(${test_command} testcommon ${ADDITIONAL_LIBS})
+        if(NOT (ZINT_USE_PNG AND PNG_FOUND))
+            target_compile_definitions(${test_command} PRIVATE ZINT_NO_PNG)
+        endif()
         add_test(${test_name} ${test_command})
         if(MSVC)
             set_tests_properties(${test_name} PROPERTIES ENVIRONMENT
@@ -20,6 +23,9 @@ macro(zint_add_test test_name test_command)
     if(ZINT_STATIC)
         add_executable(${test_command}-static ${test_command}.c)
         target_link_libraries(${test_command}-static testcommon-static ${ADDITIONAL_LIBS})
+        if(NOT (ZINT_USE_PNG AND PNG_FOUND))
+            target_compile_definitions(${test_command}-static PRIVATE ZINT_NO_PNG)
+        endif()
         add_test(${test_name}-static ${test_command}-static)
         if(MSVC)
             set_tests_properties(${test_name}-static PROPERTIES ENVIRONMENT