diff --git a/darshan-runtime/test/Makefile.am b/darshan-runtime/test/Makefile.am
index 4e15d25e0..48c3c2a12 100644
--- a/darshan-runtime/test/Makefile.am
+++ b/darshan-runtime/test/Makefile.am
@@ -10,6 +10,9 @@ check_PROGRAMS =
 if BUILD_MPIIO_MODULE
    check_PROGRAMS += tst_mpi_io
    tst_mpi_io_SOURCES = tst_mpi_io.c
+   TESTS = tst_runs.sh
+else
+   TESTS =
 endif
 
 AM_TESTS_ENVIRONMENT  = export TESTMPIRUN="$(TESTMPIRUN)";
@@ -20,8 +23,9 @@ AM_TESTS_ENVIRONMENT += export HAVE_MPI_LARGE_COUNT="$(HAVE_MPI_LARGE_COUNT)";
 AM_TESTS_ENVIRONMENT += export HAVE_OPEN_MPI="$(HAVE_OPEN_MPI)";
 AM_TESTS_ENVIRONMENT += export check_PROGRAMS="$(check_PROGRAMS)";
 
-TESTS = tst_runs.sh
 TEST_EXTENSIONS = .sh
 
 EXTRA_DIST = tst_runs.sh
 
+CLEANFILES = testfile.dat
+
diff --git a/darshan-runtime/test/tst_runs.sh b/darshan-runtime/test/tst_runs.sh
index 63192e4aa..7510529c6 100755
--- a/darshan-runtime/test/tst_runs.sh
+++ b/darshan-runtime/test/tst_runs.sh
@@ -12,23 +12,28 @@ fi
 
 if test -f $DARSHAN_INSTALL_DIR/bin/darshan-parser ; then
    DARSHAN_PARSER=$DARSHAN_INSTALL_DIR/bin/darshan-parser
-else
+elif test -f ../../darshan-util/darshan-parser ; then
    DARSHAN_PARSER=../../darshan-util/darshan-parser
+else
+   DARSHAN_PARSER=
 fi
 echo "DARSHAN_PARSER=$DARSHAN_PARSER"
 
 if test -f $DARSHAN_INSTALL_DIR/bin/darshan-config ; then
    DARSHAN_CONFIG=$DARSHAN_INSTALL_DIR/bin/darshan-config
 else
-   DARSHAN_CONFIG=../../darshan-util/darshan-config
+   DARSHAN_CONFIG=../../darshan-runtime/darshan-config
 fi
 echo "DARSHAN_CONFIG=$DARSHAN_CONFIG"
 echo ""
 
 TODAY_DATE_PATH=`date "+%Y/%-m/%-d"`
-LOG_PATH_ENV=`$DARSHAN_CONFIG --log-path-by-env`
+LOG_PATH_ENV=`sh $DARSHAN_CONFIG --log-path-by-env`
+echo "LOG_PATH_ENV=$LOG_PATH_ENV"
+
 if test "x${LOG_PATH_ENV}" != x ; then
-   if test "x${!LOG_PATH_ENV}" = x ; then
+   TOKEN1=`echo ${LOG_PATH_ENV} | cut -d, -f1`
+   if test "x${!TOKEN1}" = x ; then
       echo ""
       echo "Warning: ---------------------------------------------------------"
       echo "    Darshan was configure with --log-path-by-env set to $LOG_PATH_ENV"
@@ -54,7 +59,7 @@ df -T ${TST_DARSHAN_LOG_PATH}
 echo "findmnt -n -o FSTYPE --target ${TST_DARSHAN_LOG_PATH}"
 findmnt -n -o FSTYPE --target ${TST_DARSHAN_LOG_PATH}
 
-$DARSHAN_CONFIG --all
+sh $DARSHAN_CONFIG --all
 
 # run NP number of MPI processes, default 2
 if test "x$NP" = x ; then
@@ -303,13 +308,17 @@ for exe in ${check_PROGRAMS} ; do
           echo "ls -l ${DARSHAN_LOG_FILE}"
           ls -l ${DARSHAN_LOG_FILE}
 
-          echo "parsing ${DARSHAN_LOG_FILE}"
-          EXPECT_NBYTE=`stat -c %s $TEST_FILE`
-          nbytes=`$DARSHAN_PARSER ${DARSHAN_LOG_FILE} | grep $DARSGAN_FIELD | cut -f5`
-          # echo "EXPECT_NBYTE=$EXPECT_NBYTE nbytes=$nbytes"
-          if test "x$nbytes" != "x$EXPECT_NBYTE" ; then
-             echo "Error: CMD=$CMD nbytes=$nbytes"
-             exit 1
+          if test "x$DARSHAN_PARSER" = x ; then
+             echo "Warning: darshan-parser is not available, skip test"
+          else
+             echo "parsing ${DARSHAN_LOG_FILE}"
+             EXPECT_NBYTE=`stat -c %s $TEST_FILE`
+             nbytes=`$DARSHAN_PARSER ${DARSHAN_LOG_FILE} | grep $DARSGAN_FIELD | cut -f5`
+             # echo "EXPECT_NBYTE=$EXPECT_NBYTE nbytes=$nbytes"
+             if test "x$nbytes" != "x$EXPECT_NBYTE" ; then
+                echo "Error: CMD=$CMD nbytes=$nbytes"
+                exit 1
+             fi
           fi
       done
 
@@ -325,12 +334,16 @@ for exe in ${check_PROGRAMS} ; do
           rm -f $DARSHAN_LOG_FILE
           $CMD
 
-          echo "parsing ${DARSHAN_LOG_FILE}"
-          nbytes=`$DARSHAN_PARSER ${DARSHAN_LOG_FILE} | grep $DARSGAN_FIELD | cut -f5`
-          # echo "EXPECT_NBYTE=$EXPECT_NBYTE nbytes=$nbytes"
-          if test "x$nbytes" != "x$EXPECT_NBYTE" ; then
-             echo "Error: CMD=$CMD nbytes=$nbytes"
-             exit 1
+          if test "x$DARSHAN_PARSER" = x ; then
+             echo "Warning: darshan-parser is not available, skip test"
+          else
+             echo "parsing ${DARSHAN_LOG_FILE}"
+             nbytes=`$DARSHAN_PARSER ${DARSHAN_LOG_FILE} | grep $DARSGAN_FIELD | cut -f5`
+             # echo "EXPECT_NBYTE=$EXPECT_NBYTE nbytes=$nbytes"
+             if test "x$nbytes" != "x$EXPECT_NBYTE" ; then
+                echo "Error: CMD=$CMD nbytes=$nbytes"
+                exit 1
+             fi
           fi
       done
    fi
diff --git a/darshan-test/regression/test-cases/src/fprintf-fscanf-test.c b/darshan-test/regression/test-cases/src/fprintf-fscanf-test.c
index 19252fa58..90aedbf2d 100644
--- a/darshan-test/regression/test-cases/src/fprintf-fscanf-test.c
+++ b/darshan-test/regression/test-cases/src/fprintf-fscanf-test.c
@@ -31,15 +31,14 @@ int main(int argc, char **argv)
    int namelen;
    char processor_name[MPI_MAX_PROCESSOR_NAME];
    FILE *file;
-   char buffer[128] = {0};
    int number = 0;
 
    /* startup MPI and determine the rank of this process */
    MPI_Init(&argc,&argv);
    MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
    MPI_Comm_rank(MPI_COMM_WORLD, &mynod);
-   MPI_Get_processor_name(processor_name, &namelen); 
-   
+   MPI_Get_processor_name(processor_name, &namelen);
+
    /* parse the command line arguments */
    parse_args(argc, argv);
 
@@ -68,7 +67,7 @@ int main(int argc, char **argv)
 static int parse_args(int argc, char **argv)
 {
    int c;
-   
+
    while ((c = getopt(argc, argv, "f:")) != EOF) {
       switch (c) {
          case 'f': /* filename */
@@ -101,6 +100,6 @@ static void usage(void)
  *
  * vim: ts=3
  * End:
- */ 
+ */