diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -3,10 +3,6 @@
   ${PROJECT_BINARY_DIR}
 )
 
-IF(HAVE_GLPK)
-  INCLUDE_DIRECTORIES(${GLPK_INCLUDE_DIR})
-ENDIF(HAVE_GLPK)
-
 LINK_DIRECTORIES(${PROJECT_BINARY_DIR}/lemon)
 
 SET(TESTS