diff --git a/test/lp_test.cc b/test/lp_test.cc
--- a/test/lp_test.cc
+++ b/test/lp_test.cc
@@ -366,6 +366,7 @@
     lpTest(lp_glpk1);
     aTest(lp_glpk2);
   }
+  GlpkLp::freeEnv();
 #endif
 
 #ifdef HAVE_CPLEX