diff --git a/Tests/Complex/Executable/CMakeLists.txt b/Tests/Complex/Executable/CMakeLists.txt
index 438808fae..5cf405491 100644
--- a/Tests/Complex/Executable/CMakeLists.txt
+++ b/Tests/Complex/Executable/CMakeLists.txt
@@ -25,11 +25,12 @@ TARGET_LINK_LIBRARIES(complex
 
 #
 # Output the files required by 'complex' to a file.
-# The 'complex' executable will then test if this file exists and remove it.
-# The contents of this file is not tested (absolute paths).
 #
-#OUTPUT_REQUIRED_FILES(${Complex_SOURCE_DIR}/Executable/complex.cxx 
-#	              ${Complex_BINARY_DIR}/Executable/complex-required.txt)  
+# This test has been moved to the 'required' subdir so that it
+# has no side-effects on the current Makefile (duplicated source file
+# due to source list expansion done twice).
+#
+SUBDIRS(required)
 
 #
 # Extra coverage.Not used.
diff --git a/Tests/Complex/Executable/complex.cxx b/Tests/Complex/Executable/complex.cxx
index b0b7b6c93..9e24c33e3 100644
--- a/Tests/Complex/Executable/complex.cxx
+++ b/Tests/Complex/Executable/complex.cxx
@@ -516,7 +516,7 @@ int main()
   // the file was removed the last time 'complex' was run, and it is
   // only created during a build.
 
-  // TestAndRemoveFile(BINARY_DIR "/Executable/complex-required.txt");
+  TestAndRemoveFile(BINARY_DIR "/Executable/required/complex-required.txt");
 
   // ----------------------------------------------------------------------
   // Summary
diff --git a/Tests/Complex/Executable/required/CMakeLists.txt b/Tests/Complex/Executable/required/CMakeLists.txt
new file mode 100644
index 000000000..473998364
--- /dev/null
+++ b/Tests/Complex/Executable/required/CMakeLists.txt
@@ -0,0 +1,8 @@
+#
+# Output the files required by 'complex' to a file.
+# The 'complex' executable will then test if this file exists and remove it.
+# The contents of this file is not tested (absolute paths).
+#
+OUTPUT_REQUIRED_FILES(
+   ${Complex_SOURCE_DIR}/Executable/complex.cxx 
+   ${Complex_BINARY_DIR}/Executable/required/complex-required.txt)  
diff --git a/Tests/ComplexOneConfig/Executable/CMakeLists.txt b/Tests/ComplexOneConfig/Executable/CMakeLists.txt
index 438808fae..5cf405491 100644
--- a/Tests/ComplexOneConfig/Executable/CMakeLists.txt
+++ b/Tests/ComplexOneConfig/Executable/CMakeLists.txt
@@ -25,11 +25,12 @@ TARGET_LINK_LIBRARIES(complex
 
 #
 # Output the files required by 'complex' to a file.
-# The 'complex' executable will then test if this file exists and remove it.
-# The contents of this file is not tested (absolute paths).
 #
-#OUTPUT_REQUIRED_FILES(${Complex_SOURCE_DIR}/Executable/complex.cxx 
-#	              ${Complex_BINARY_DIR}/Executable/complex-required.txt)  
+# This test has been moved to the 'required' subdir so that it
+# has no side-effects on the current Makefile (duplicated source file
+# due to source list expansion done twice).
+#
+SUBDIRS(required)
 
 #
 # Extra coverage.Not used.
diff --git a/Tests/ComplexOneConfig/Executable/complex.cxx b/Tests/ComplexOneConfig/Executable/complex.cxx
index b0b7b6c93..9e24c33e3 100644
--- a/Tests/ComplexOneConfig/Executable/complex.cxx
+++ b/Tests/ComplexOneConfig/Executable/complex.cxx
@@ -516,7 +516,7 @@ int main()
   // the file was removed the last time 'complex' was run, and it is
   // only created during a build.
 
-  // TestAndRemoveFile(BINARY_DIR "/Executable/complex-required.txt");
+  TestAndRemoveFile(BINARY_DIR "/Executable/required/complex-required.txt");
 
   // ----------------------------------------------------------------------
   // Summary
diff --git a/Tests/ComplexOneConfig/Executable/required/CMakeLists.txt b/Tests/ComplexOneConfig/Executable/required/CMakeLists.txt
new file mode 100644
index 000000000..473998364
--- /dev/null
+++ b/Tests/ComplexOneConfig/Executable/required/CMakeLists.txt
@@ -0,0 +1,8 @@
+#
+# Output the files required by 'complex' to a file.
+# The 'complex' executable will then test if this file exists and remove it.
+# The contents of this file is not tested (absolute paths).
+#
+OUTPUT_REQUIRED_FILES(
+   ${Complex_SOURCE_DIR}/Executable/complex.cxx 
+   ${Complex_BINARY_DIR}/Executable/required/complex-required.txt)  
diff --git a/Tests/ComplexRelativePaths/Executable/CMakeLists.txt b/Tests/ComplexRelativePaths/Executable/CMakeLists.txt
index 438808fae..5cf405491 100644
--- a/Tests/ComplexRelativePaths/Executable/CMakeLists.txt
+++ b/Tests/ComplexRelativePaths/Executable/CMakeLists.txt
@@ -25,11 +25,12 @@ TARGET_LINK_LIBRARIES(complex
 
 #
 # Output the files required by 'complex' to a file.
-# The 'complex' executable will then test if this file exists and remove it.
-# The contents of this file is not tested (absolute paths).
 #
-#OUTPUT_REQUIRED_FILES(${Complex_SOURCE_DIR}/Executable/complex.cxx 
-#	              ${Complex_BINARY_DIR}/Executable/complex-required.txt)  
+# This test has been moved to the 'required' subdir so that it
+# has no side-effects on the current Makefile (duplicated source file
+# due to source list expansion done twice).
+#
+SUBDIRS(required)
 
 #
 # Extra coverage.Not used.
diff --git a/Tests/ComplexRelativePaths/Executable/complex.cxx b/Tests/ComplexRelativePaths/Executable/complex.cxx
index b0b7b6c93..9e24c33e3 100644
--- a/Tests/ComplexRelativePaths/Executable/complex.cxx
+++ b/Tests/ComplexRelativePaths/Executable/complex.cxx
@@ -516,7 +516,7 @@ int main()
   // the file was removed the last time 'complex' was run, and it is
   // only created during a build.
 
-  // TestAndRemoveFile(BINARY_DIR "/Executable/complex-required.txt");
+  TestAndRemoveFile(BINARY_DIR "/Executable/required/complex-required.txt");
 
   // ----------------------------------------------------------------------
   // Summary
diff --git a/Tests/ComplexRelativePaths/Executable/required/CMakeLists.txt b/Tests/ComplexRelativePaths/Executable/required/CMakeLists.txt
new file mode 100644
index 000000000..473998364
--- /dev/null
+++ b/Tests/ComplexRelativePaths/Executable/required/CMakeLists.txt
@@ -0,0 +1,8 @@
+#
+# Output the files required by 'complex' to a file.
+# The 'complex' executable will then test if this file exists and remove it.
+# The contents of this file is not tested (absolute paths).
+#
+OUTPUT_REQUIRED_FILES(
+   ${Complex_SOURCE_DIR}/Executable/complex.cxx 
+   ${Complex_BINARY_DIR}/Executable/required/complex-required.txt)