diff --git a/Tests/Complex/Executable/complex.cxx b/Tests/Complex/Executable/complex.cxx
index 02aa6dcfd6..f48ce99c50 100644
--- a/Tests/Complex/Executable/complex.cxx
+++ b/Tests/Complex/Executable/complex.cxx
@@ -5,7 +5,6 @@
 #include "cmStandardIncludes.h"
 #include <sys/stat.h>
 #include <stdio.h>
-#include <io.h>
 
 #if defined(_MSC_VER) || defined(__BORLANDC__)
 #define _unlink unlink
diff --git a/Tests/ComplexOneConfig/Executable/complex.cxx b/Tests/ComplexOneConfig/Executable/complex.cxx
index 02aa6dcfd6..f48ce99c50 100644
--- a/Tests/ComplexOneConfig/Executable/complex.cxx
+++ b/Tests/ComplexOneConfig/Executable/complex.cxx
@@ -5,7 +5,6 @@
 #include "cmStandardIncludes.h"
 #include <sys/stat.h>
 #include <stdio.h>
-#include <io.h>
 
 #if defined(_MSC_VER) || defined(__BORLANDC__)
 #define _unlink unlink
diff --git a/Tests/ComplexRelativePaths/Executable/complex.cxx b/Tests/ComplexRelativePaths/Executable/complex.cxx
index 02aa6dcfd6..f48ce99c50 100644
--- a/Tests/ComplexRelativePaths/Executable/complex.cxx
+++ b/Tests/ComplexRelativePaths/Executable/complex.cxx
@@ -5,7 +5,6 @@
 #include "cmStandardIncludes.h"
 #include <sys/stat.h>
 #include <stdio.h>
-#include <io.h>
 
 #if defined(_MSC_VER) || defined(__BORLANDC__)
 #define _unlink unlink