diff --git a/unit_test/run_dfaltpluginpath.sh b/unit_test/run_dfaltpluginpath.sh
index ac3c635a7a..91e54a75ec 100755
--- a/unit_test/run_dfaltpluginpath.sh
+++ b/unit_test/run_dfaltpluginpath.sh
@@ -15,7 +15,7 @@ FAIL=
 
 # Test with no HDF5_PLUGIN_PATH
 unset HDF5_PLUGIN_PATH
-NOHPP1=`ncpluginpath -f global`
+NOHPP1=`${execdir}/ncpluginpath -f global`
 if test "x$NOHPP1" = "x/usr/local/hdf5/lib/plugin" || test "x$NOHPP1" = "xC:ProgramData/hdf5/lib/plugin" ; then
 echo "***PASS: default plugin path = |$NOHPP1|"
 else
@@ -26,7 +26,7 @@ fi
 # Test with given HDF5_PLUGIN_PATH
 unset HDF5_PLUGIN_PATH
 export HDF5_PLUGIN_PATH="$TESTHPP"
-HPP1=`ncpluginpath -f global`
+HPP1=`${execdir}/ncpluginpath -f global`
 if test "x$HPP1" = "x$TESTHPP" ; then
 echo "***PASS: default plugin path: |$HPP1| HDF5_PLUGIN_PATH=|$HDF5_PLUGIN_PATH|"
 else