diff --git a/Tests/BuildDepends/CMakeLists.txt b/Tests/BuildDepends/CMakeLists.txt
index 27927512a..6281c40f3 100644
--- a/Tests/BuildDepends/CMakeLists.txt
+++ b/Tests/BuildDepends/CMakeLists.txt
@@ -53,6 +53,8 @@ write_file(${BuildDepends_BINARY_DIR}/Project/foo.cxx
 
 file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot.hxx.in
   "static const char* zot = \"zot\";\n")
+file(WRITE ${BuildDepends_BINARY_DIR}/Project/dir/header.txt
+  "#define HEADER_STRING \"ninja\"\n" )
 file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot_custom.hxx.in
   "static const char* zot_custom = \"zot_custom\";\n")
 file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot_macro_dir.hxx
@@ -93,6 +95,26 @@ if(NOT RESULT)
   message(SEND_ERROR "Could not build test project (1)!")
 endif()
 
+# find and save the ninjadep executable
+set(ninjadep ${BuildDepends_BINARY_DIR}/Project/ninjadep${CMAKE_EXECUTABLE_SUFFIX})
+if(EXISTS
+    "${BuildDepends_BINARY_DIR}/Project/Debug/ninjadep${CMAKE_EXECUTABLE_SUFFIX}" )
+  message("found debug")
+  set(ninjadep
+    "${BuildDepends_BINARY_DIR}/Project/Debug/ninjadep${CMAKE_EXECUTABLE_SUFFIX}")
+endif()
+message("Running ${ninjadep}  ")
+execute_process(COMMAND ${ninjadep} OUTPUT_VARIABLE out RESULT_VARIABLE runResult)
+string(REGEX REPLACE "[\r\n]" " " out "${out}")
+message("Run result: ${runResult} Output: \"${out}\"")
+
+if("${out}" STREQUAL "HEADER_STRING: ninja ")
+  message("Worked!")
+else()
+  message(SEND_ERROR "Project did not rebuild properly. Output[${out}]\n"
+    " expected [HEADER_STRING: ninja]")
+endif()
+
 set(bar ${BuildDepends_BINARY_DIR}/Project/bar${CMAKE_EXECUTABLE_SUFFIX})
 if(EXISTS
     "${BuildDepends_BINARY_DIR}/Project/Debug/bar${CMAKE_EXECUTABLE_SUFFIX}" )
@@ -151,6 +173,8 @@ execute_process(COMMAND ${bar} -infinite TIMEOUT 3 OUTPUT_VARIABLE out)
 message("Modifying Project/foo.cxx")
 write_file(${BuildDepends_BINARY_DIR}/Project/foo.cxx
   "const char* foo() { return \"foo changed\";}" )
+file(WRITE "${BuildDepends_BINARY_DIR}/Project/dir/header.txt"
+  "#define HEADER_STRING \"ninja changed\"\n" )
 file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot.hxx.in
   "static const char* zot = \"zot changed\";\n")
 file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot_custom.hxx.in
@@ -204,6 +228,18 @@ if(EXISTS
   message("found debug")
 endif()
 
+message("Running ${ninjadep}  ")
+execute_process(COMMAND ${ninjadep} OUTPUT_VARIABLE out RESULT_VARIABLE runResult)
+string(REGEX REPLACE "[\r\n]" " " out "${out}")
+message("Run result: ${runResult} Output: \"${out}\"")
+
+if("${out}" STREQUAL "HEADER_STRING: ninja changed ")
+  message("Worked!")
+else()
+  message(SEND_ERROR "Project did not rebuild properly. Output[${out}]\n"
+    " expected [HEADER_STRING: ninja changed]")
+endif()
+
 message("Running ${bar}  ")
 execute_process(COMMAND ${bar} OUTPUT_VARIABLE out RESULT_VARIABLE runResult)
 string(REGEX REPLACE "[\r\n]" " " out "${out}")
diff --git a/Tests/BuildDepends/Project/CMakeLists.txt b/Tests/BuildDepends/Project/CMakeLists.txt
index f8a3d1550..b4c6a0710 100644
--- a/Tests/BuildDepends/Project/CMakeLists.txt
+++ b/Tests/BuildDepends/Project/CMakeLists.txt
@@ -123,3 +123,19 @@ add_custom_target(link_depends_no_shared_check ALL
    -P ${CMAKE_CURRENT_SOURCE_DIR}/link_depends_no_shared_check.cmake
   )
 add_dependencies(link_depends_no_shared_check link_depends_no_shared_exe)
+
+add_custom_command(
+  OUTPUT  ${CMAKE_CURRENT_BINARY_DIR}/dir/header.h
+  DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/dir/header.txt
+  COMMAND ${CMAKE_COMMAND} -E copy_if_different
+  ${CMAKE_CURRENT_BINARY_DIR}/dir/header.txt
+  ${CMAKE_CURRENT_BINARY_DIR}/dir/header.h
+  )
+
+set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/dir/header.h
+  PROPERTIES GENERATED 1)
+
+add_custom_target(header_tgt DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/dir/header.h)
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+add_executable(ninjadep ninjadep.cpp)
+add_dependencies(ninjadep header_tgt)
diff --git a/Tests/BuildDepends/Project/ninjadep.cpp b/Tests/BuildDepends/Project/ninjadep.cpp
new file mode 100644
index 000000000..8d6133613
--- /dev/null
+++ b/Tests/BuildDepends/Project/ninjadep.cpp
@@ -0,0 +1,6 @@
+#include <stdio.h>
+#include "dir/header.h"
+
+int main() {
+  printf("HEADER_STRING: %s\n", HEADER_STRING);
+}