diff --git a/src/tests/string/CMakeLists.txt b/src/tests/string/CMakeLists.txt
index bda103c7b..6e3908ca7 100644
--- a/src/tests/string/CMakeLists.txt
+++ b/src/tests/string/CMakeLists.txt
@@ -2,4 +2,5 @@ ADDTEST(string_assignment)
 ADDTEST(string_operator)
 ADDTEST(string_intrinsic)
 ADDTEST(string_derivedtype_io)
+ADDTEST(string_functions)
 
diff --git a/src/tests/string/Makefile.manual b/src/tests/string/Makefile.manual
index e3789447d..be5bb9f44 100644
--- a/src/tests/string/Makefile.manual
+++ b/src/tests/string/Makefile.manual
@@ -1,5 +1,6 @@
 PROGS_SRC = test_string_assignment.f90 \
             test_string_derivedtype_io.f90 \
+            test_string_functions.f90 \
             test_string_intrinsic.f90 \
             test_string_operator.f90
 
diff --git a/src/tests/string/test_string_functions.f90 b/src/tests/string/test_string_functions.f90
index 7adeffa17..4a8d516a8 100644
--- a/src/tests/string/test_string_functions.f90
+++ b/src/tests/string/test_string_functions.f90
@@ -28,7 +28,7 @@ end subroutine test_to_upper_string
     subroutine test_to_title_string
         type(string_type) :: test_string, compare_string
         test_string = "_#To tiTlE !$%-az09AZ"
-        compare_string = "_#To title !$%-a09az"
+        compare_string = "_#To title !$%-az09az"
 
         call check(to_title(test_string) == compare_string)