diff --git a/Source/Tests/preprocessor.nsi b/Source/Tests/preprocessor.nsi
new file mode 100644
index 00000000..786eeb4c
--- /dev/null
+++ b/Source/Tests/preprocessor.nsi
@@ -0,0 +1,42 @@
+Name preprocessor
+OutFile preprocessor.exe
+
+!ifdef some_define_that_doesnt_exist
+this should not be executed, so no error should be raised
+/*
+code inside comments should not be executed
+!ifdef
+*/
+!endif
+
+!ifdef d1
+!error "d1 is not defined!"
+!else ifdef d2
+!error "d2 is not defined!"
+!else
+# this should be compiled
+!endif
+
+!define d1
+
+!ifdef d1
+# this should be compiled
+!else ifdef d2
+!error "d2 is not defined!"
+!else
+!error "d1 is defined!"
+!endif
+
+!undef d1
+!define d2
+
+!ifdef d1
+!error "d1 is not defined!"
+!else ifdef d2
+# this should be compiled
+!else
+!error "d2 is defined!"
+!endif
+
+Section
+SectionEnd