diff --git a/tests/outfile/data/enP1kAlM b/tests/outfile/data/enP1kAlM
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_link.cpp b/tests/test_link.cpp
index b645ab6..3f91167 100644
--- a/tests/test_link.cpp
+++ b/tests/test_link.cpp
@@ -36,7 +36,7 @@ BOOST_FIXTURE_TEST_CASE(test_adddelete_link, FixtureInitClose)
     error = EN_addlink(ph, (char *)"L2", EN_PIPE, (char *)"N1", (char *)"N3");
     BOOST_REQUIRE(error == 0);
 
-    error = EN_getlinkindex(ph, "L2", &index);
+    error = EN_getlinkindex(ph, (char *)"L2", &index);
     BOOST_REQUIRE(error == 0);
     error = EN_deletelink(ph, index, EN_UNCONDITIONAL);
     BOOST_REQUIRE(error == 0);
@@ -44,11 +44,11 @@ BOOST_FIXTURE_TEST_CASE(test_adddelete_link, FixtureInitClose)
     error = EN_addlink(ph, (char *)"L3", EN_PIPE, (char *)"N1", (char *)"N2");
     BOOST_REQUIRE(error == 0);
 
-    error = EN_getlinkindex(ph, "L1", &index);
+    error = EN_getlinkindex(ph, (char *)"L1", &index);
     BOOST_REQUIRE(error == 0);
     error = EN_deletelink(ph, index, EN_UNCONDITIONAL);
     BOOST_REQUIRE(error == 0);
-    error = EN_getlinkindex(ph, "L3", &index);
+    error = EN_getlinkindex(ph, (char *)"L3", &index);
     BOOST_REQUIRE(error == 0);
     error = EN_deletelink(ph, index, EN_UNCONDITIONAL);
     BOOST_REQUIRE(error == 0);
diff --git a/tests/test_node.cpp b/tests/test_node.cpp
index 058fc77..d0642ea 100644
--- a/tests/test_node.cpp
+++ b/tests/test_node.cpp
@@ -28,7 +28,7 @@ BOOST_FIXTURE_TEST_CASE(test_adddelete_node, FixtureInitClose)
     error = EN_addnode(ph, (char *)"N3", EN_RESERVOIR);
     BOOST_REQUIRE(error == 0);
 
-    error = EN_getnodeindex(ph, "N2", &index);
+    error = EN_getnodeindex(ph, (char *)"N2", &index);
     BOOST_REQUIRE(error == 0);
     error = EN_deletenode(ph, index, EN_UNCONDITIONAL);
     BOOST_REQUIRE(error == 0);
@@ -36,11 +36,11 @@ BOOST_FIXTURE_TEST_CASE(test_adddelete_node, FixtureInitClose)
     error = EN_addnode(ph, (char *)"N4", EN_TANK);
     BOOST_REQUIRE(error == 0);
 
-    error = EN_getnodeindex(ph, "N4", &index);
+    error = EN_getnodeindex(ph, (char *)"N4", &index);
     BOOST_REQUIRE(error == 0);
     error = EN_deletenode(ph, index, EN_UNCONDITIONAL);
     BOOST_REQUIRE(error == 0);
-    error = EN_getnodeindex(ph, "N3", &index);
+    error = EN_getnodeindex(ph, (char *)"N3", &index);
     BOOST_REQUIRE(error == 0);
     error = EN_deletenode(ph, index, EN_UNCONDITIONAL);
     BOOST_REQUIRE(error == 0);