diff --git a/CMakeLists.txt b/CMakeLists.txt
index 39e65c4a78..c4bb26b7b7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,7 +65,7 @@ ENDIF("${isSystemDir}" STREQUAL "-1")
 
 # wipe lib/ drectory on clean. It will have plugins that could be out of date
 # in the next build
-set_directory_properties(PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "${PDAL_OUTPUT_LIB_DIR}")
+set_directory_properties(PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "${PDAL_OUTPUT_LIB_DIR}/*")
 
 if(WIN32)
   add_definitions("-DPDAL_DLL_EXPORT=1")
diff --git a/plugins/hexbin/test/HexbinFilterTest.cpp b/plugins/hexbin/test/HexbinFilterTest.cpp
index cadf8ff91b..e625503f59 100644
--- a/plugins/hexbin/test/HexbinFilterTest.cpp
+++ b/plugins/hexbin/test/HexbinFilterTest.cpp
@@ -61,6 +61,7 @@ TEST(HexbinFilterTest, HexbinFilterTest_test_1)
 
     Options options;
     options.add("filename", Support::datapath("las/hextest.las"));
+    options.add("output_tesselation", true);
     options.add("sample_size", 5000, "Number of samples to use "
         "when estimating hexagon edge size. Specify 0.0 for edge_size if "
         "you want to compute one.");