Index: tests/complex.cfa
===================================================================
--- tests/complex.cfa	(revision f1791a44d781391f73246886d5da188e94e3110a)
+++ tests/complex.cfa	(revision afe2939a30aac00ce0015efe45885467dd1a3fc3)
@@ -14,5 +14,4 @@
 //
 
-#include <stdio.h>
 #include <complex.h>
 #ifdef __CFA__
Index: tests/exceptions/cancel/coroutine.cfa
===================================================================
--- tests/exceptions/cancel/coroutine.cfa	(revision f1791a44d781391f73246886d5da188e94e3110a)
+++ tests/exceptions/cancel/coroutine.cfa	(revision afe2939a30aac00ce0015efe45885467dd1a3fc3)
@@ -1,5 +1,4 @@
 // Try cancelling a coroutine.
 
-#include <stdio.h>
 #include <coroutine.hfa>
 #include <exception.hfa>
Index: tests/exceptions/conditional.cfa
===================================================================
--- tests/exceptions/conditional.cfa	(revision f1791a44d781391f73246886d5da188e94e3110a)
+++ tests/exceptions/conditional.cfa	(revision afe2939a30aac00ce0015efe45885467dd1a3fc3)
@@ -5,5 +5,4 @@
 
 #include <exception.hfa>
-#include <stdio.h>
 
 VTABLE_DECLARATION(num_error)(
Index: tests/exceptions/except-io.hfa
===================================================================
--- tests/exceptions/except-io.hfa	(revision f1791a44d781391f73246886d5da188e94e3110a)
+++ tests/exceptions/except-io.hfa	(revision afe2939a30aac00ce0015efe45885467dd1a3fc3)
@@ -1,5 +1,3 @@
 // Common tools for the exception tests.
-
-#include <stdio.h>
 
 // Echo when a destructor is run and an area/block is left.
Index: tests/exceptions/trash.cfa
===================================================================
--- tests/exceptions/trash.cfa	(revision f1791a44d781391f73246886d5da188e94e3110a)
+++ tests/exceptions/trash.cfa	(revision afe2939a30aac00ce0015efe45885467dd1a3fc3)
@@ -2,5 +2,4 @@
 
 #include <exception.hfa>
-#include <stdio.h>
 
 TRIVIAL_EXCEPTION(yin);
Index: tests/global-monomorph.cfa
===================================================================
--- tests/global-monomorph.cfa	(revision f1791a44d781391f73246886d5da188e94e3110a)
+++ tests/global-monomorph.cfa	(revision afe2939a30aac00ce0015efe45885467dd1a3fc3)
@@ -1,6 +1,3 @@
-// Crea
-
-#include <stdlib.hfa>
-#include <stdio.h>
+// Create monomorphic instances of polymorphic types at global scope.
 
 forall(dtype T)
Index: tests/poly-d-cycle.cfa
===================================================================
--- tests/poly-d-cycle.cfa	(revision f1791a44d781391f73246886d5da188e94e3110a)
+++ tests/poly-d-cycle.cfa	(revision afe2939a30aac00ce0015efe45885467dd1a3fc3)
@@ -1,5 +1,3 @@
 // Check that a cycle of polymorphic dtype structures can be instancated.
-
-#include <stdio.h>
 
 forall(dtype T)
Index: tests/poly-o-cycle.cfa
===================================================================
--- tests/poly-o-cycle.cfa	(revision f1791a44d781391f73246886d5da188e94e3110a)
+++ tests/poly-o-cycle.cfa	(revision afe2939a30aac00ce0015efe45885467dd1a3fc3)
@@ -1,5 +1,3 @@
 // Check that a cycle of polymorphic otype structures can be instancated.
-
-#include <stdio.h>
 
 forall(otype T)