Index: src/tests/.in/io.data
===================================================================
--- src/tests/.in/io.data	(revision cbdf56541cc265d624bb052bc9234bf2ebbb1641)
+++ src/tests/.in/io.data	(revision cbdf56541cc265d624bb052bc9234bf2ebbb1641)
@@ -0,0 +1,1 @@
+falseA 23 93 1 2 3 4 5 6 7 8 1.1 1.2 1.3 1.1+2.3 1.1-2.3 1.1-2.3 abc xyz
Index: src/tests/Makefile.am
===================================================================
--- src/tests/Makefile.am	(revision 552f5cb4b73c9ef7c7998db595343c3d9be437f6)
+++ src/tests/Makefile.am	(revision cbdf56541cc265d624bb052bc9234bf2ebbb1641)
@@ -44,5 +44,5 @@
 TEST_FLAGS = $(if $(test), 2> $(test), )
 AM_CFLAGS = ${TEST_FLAGS} ${BUILD_FLAGS}
-CC = ${abs_top_builddir}/src/driver/cfa -I${srcdir}
+CC = ${abs_top_builddir}/src/driver/cfa -I${srcdir} -DIN_DIR="${srcdir}/.in/"
 
 .PHONY : list
Index: src/tests/Makefile.in
===================================================================
--- src/tests/Makefile.in	(revision 552f5cb4b73c9ef7c7998db595343c3d9be437f6)
+++ src/tests/Makefile.in	(revision cbdf56541cc265d624bb052bc9234bf2ebbb1641)
@@ -193,5 +193,5 @@
 AWK = @AWK@
 BACKEND_CC = @BACKEND_CC@
-CC = ${abs_top_builddir}/src/driver/cfa -I${srcdir}
+CC = ${abs_top_builddir}/src/driver/cfa -I${srcdir} -DIN_DIR="${srcdir}/.in/"
 CCAS = @CCAS@
 CCASDEPMODE = @CCASDEPMODE@
Index: src/tests/io.data
===================================================================
--- src/tests/io.data	(revision 552f5cb4b73c9ef7c7998db595343c3d9be437f6)
+++ 	(revision )
@@ -1,1 +1,0 @@
-falseA 23 93 1 2 3 4 5 6 7 8 1.1 1.2 1.3 1.1+2.3 1.1-2.3 1.1-2.3 abc xyz
Index: src/tests/io2.c
===================================================================
--- src/tests/io2.c	(revision 552f5cb4b73c9ef7c7998db595343c3d9be437f6)
+++ src/tests/io2.c	(revision cbdf56541cc265d624bb052bc9234bf2ebbb1641)
@@ -1,10 +1,10 @@
-// 
+//
 // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
 //
 // The contents of this file are covered under the licence agreement in the
 // file "LICENCE" distributed with Cforall.
-// 
-// io2.c -- 
-// 
+//
+// io2.c --
+//
 // Author           : Peter A. Buhr
 // Created On       : Wed Mar  2 16:56:02 2016
@@ -12,7 +12,10 @@
 // Last Modified On : Thu May 24 21:17:41 2018
 // Update Count     : 103
-// 
+//
 
 #include <fstream>
+
+ #define xstr(s) str(s)
+#define str(s) #s
 
 int main() {
@@ -38,5 +41,5 @@
 	char s1[size], s2[size];
 
-	ifstream in = { "io.data" };						// create / open file
+	ifstream in = { xstr(IN_DIR) "io.data" };						// create / open file
 
 	sout | "input bacis types" | endl;