diff --git a/extra/c/tests/test10/test10.c b/extra/c/tests/test10/test10.c
new file mode 100644
index 0000000000..7f38e70d73
--- /dev/null
+++ b/extra/c/tests/test10/test10.c
@@ -0,0 +1,3 @@
+/*
+# lol
+*/
diff --git a/extra/c/tests/test11/foo.h b/extra/c/tests/test11/foo.h
new file mode 100644
index 0000000000..381b7535a0
--- /dev/null
+++ b/extra/c/tests/test11/foo.h
@@ -0,0 +1 @@
+foo.h ftw
diff --git a/extra/c/tests/test11/test11.c b/extra/c/tests/test11/test11.c
new file mode 100644
index 0000000000..1b05118b01
--- /dev/null
+++ b/extra/c/tests/test11/test11.c
@@ -0,0 +1,2 @@
+#define FOO_H "foo.h"
+#include FOO_H
diff --git a/extra/c/tests/test12/test12.c b/extra/c/tests/test12/test12.c
new file mode 100644
index 0000000000..2da127bce0
--- /dev/null
+++ b/extra/c/tests/test12/test12.c
@@ -0,0 +1,3 @@
+#if 4 > (5 - 4++)
+#error "Umm"
+#endif
diff --git a/extra/c/tests/test13/test13.c b/extra/c/tests/test13/test13.c
new file mode 100644
index 0000000000..13c48ff6d0
--- /dev/null
+++ b/extra/c/tests/test13/test13.c
@@ -0,0 +1,2 @@
+#if 10
+#error "Umm"
diff --git a/extra/c/tests/test14/test14.c b/extra/c/tests/test14/test14.c
new file mode 100644
index 0000000000..1697ea1697
--- /dev/null
+++ b/extra/c/tests/test14/test14.c
@@ -0,0 +1,15 @@
+#if 4 > (1 + 2) 
+good
+#endif
+
+#if 4 > 1 + 2
+good
+#endif
+
+#if (4 > 1) - 1
+bad
+#endif
+
+#if (4 > 1) - 2
+good
+#endif