diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index b73dfc9a..8b1809dd 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -133,6 +133,12 @@ foreach(file ${files})
     )
     set_tests_properties("${testcase}_all" PROPERTIES LABELS "all")
 
+    # Increase timeout for test-unicode_all on Debug build
+    string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
+	if (("${testcase}" STREQUAL "test-unicode") AND (uppercase_CMAKE_BUILD_TYPE  STREQUAL DEBUG))
+		set_tests_properties("${testcase}_all" PROPERTIES TIMEOUT 3600)
+	endif()
+
     if(JSON_Valgrind)
         add_test(NAME "${testcase}_valgrind"
           COMMAND ${memcheck_command} ${CMAKE_CURRENT_BINARY_DIR}/${testcase} ${DOCTEST_TEST_FILTER}