diff --git a/lib/bash/log_warn_die.sh b/lib/bash/log_warn_die.sh
index ef60daa3..6d5ca2e4 100644
--- a/lib/bash/log_warn_die.sh
+++ b/lib/bash/log_warn_die.sh
@@ -15,14 +15,15 @@
 # this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 # Place, Suite 330, Boston, MA  02111-1307  USA.
 # ###########################################################################
-# Begin log_warn_die lib
+# log_warn_die package
 # ###########################################################################
 
-# Library: log_warn_die
+# Package: log_warn_die
 # log_warn_die provides standard log(), warn(), and die() subs.
 
 set -u
 
+# Global variables.
 EXIT_STATUS=0
 
 log() {
@@ -41,5 +42,5 @@ die() {
 }
 
 # ###########################################################################
-# End log_warn_die lib
+# End log_warn_die package
 # ###########################################################################
diff --git a/lib/bash/parse_options.sh b/lib/bash/parse_options.sh
index 8b6b31d2..b94ea52b 100644
--- a/lib/bash/parse_options.sh
+++ b/lib/bash/parse_options.sh
@@ -15,10 +15,10 @@
 # this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 # Place, Suite 330, Boston, MA  02111-1307  USA.
 # ###########################################################################
-# Begin parse_options lib
+# parse_options package
 # ###########################################################################
 
-# Library: parse_options
+# Package: parse_options
 # parse_options parses Perl POD options from Bash tools and creates
 # global variables for each option.
 
@@ -36,7 +36,7 @@ declare EXT_ARGV  # everything after -- (args for an external command)
 #   file - Program file with Perl POD which has usage and options.
 #
 # Required Global Variables:
-#   TIMDIR  - Temp directory.
+#   TIMDIR  - Temp directory set by <set_TMPDIR()>.
 #   TOOL    - Tool's name.
 #
 # Optional Global Variables:
@@ -66,9 +66,9 @@ usage() {
 #   file - Program file with Perl POD options.
 #
 # Required Global Variables:
-#   TIMDIR  - Temp directory.
+#   TIMDIR  - Temp directory set by <set_TMPDIR()>.
 #
-# Declared Global Variables:
+# Set Global Variables:
 #   This sub decalres a global var for each option by uppercasing the
 #   option, removing the option's leading --, changing all - to _, and
 #   prefixing with "OPT_".  E.g. --foo-bar becomes OPT_FOO_BAR.
@@ -121,7 +121,7 @@ parse_options() {
    while read spec; do
       opt=$(echo $spec | cut -d',' -f1 | sed 's/-/_/g' | tr [:lower:] [:upper:])
       default=$(echo $spec | cut -d',' -f4)
-      eval "$opt"="$default"
+      eval "OPT_${opt}"="$default"
    done < <(cat $TMPDIR/options)
 
    for opt; do
@@ -156,7 +156,7 @@ parse_options() {
       fi
       opt=$(echo $spec | cut -d',' -f1)
       required_arg=$(echo $spec | cut -d',' -f3)
-      val=1
+      val="yes"
       if [ -n "$required_arg" ]; then
          if [ $# -eq 0 ]; then
             die "--$opt requires a $required_arg argument"
@@ -166,10 +166,10 @@ parse_options() {
          fi
       fi
       opt=$(echo $opt | sed 's/-/_/g' | tr [:lower:] [:upper:])
-      eval "$opt"="$val"
+      eval "OPT_${opt}"="$val"
    done
 }
 
 # ###########################################################################
-# End parse_options lib
+# End parse_options package
 # ###########################################################################
diff --git a/lib/bash/tmpdir.sh b/lib/bash/tmpdir.sh
index 208d883b..143ec1df 100644
--- a/lib/bash/tmpdir.sh
+++ b/lib/bash/tmpdir.sh
@@ -15,17 +15,26 @@
 # this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 # Place, Suite 330, Boston, MA  02111-1307  USA.
 # ###########################################################################
-# Begin tmpdir lib
+# tmpdir package
 # ###########################################################################
 
-# Library: tmpdir
+# Package: tmpdir
 # tmpdir make a secure temporary directory using mktemp.
 
 set -u
 
+# Global variables.
 TMPDIR=""
 OPT_TMPDIR={OPT_TMPDIR:""}
 
+# Sub: set_TMPDIR
+#   Create a secure tmpdir and set TMPDIR.
+#
+# Optional Global Variables:
+#   OPT_TMPDIR - User-specified --tmpdir (default none).
+#
+# Set Global Variables:
+#   TMPDIR - Absolute path of secure temp directory.
 set_TMPDIR() {
    if [ -n "$OPT_TMPDIR" ]; then
       TMPDIR="$OPT_TMPDIR"
@@ -38,6 +47,14 @@ set_TMPDIR() {
    fi
 }
 
+# Sub: rm_TMPDIR
+#   Remove the tmpdir and unset TMPDIR.
+#
+# Optional Global Variables:
+#   TMPDIR - TMPDIR set by <set_TMPDIR()>.
+#
+# Set Global Variables:
+#   TMPDIR - Set to "".
 rm_TMPDIR() {
    if [ -n "$TMPDIR" ] && [ -d "$TMPDIR" ]; then
       rm -rf $TMPDIR
@@ -46,5 +63,5 @@ rm_TMPDIR() {
 }
 
 # ###########################################################################
-# End tmpdir lib
+# End tmpdir package
 # ###########################################################################
diff --git a/t/lib/bash.t b/t/lib/bash.t
old mode 100755
new mode 100644
diff --git a/t/lib/bash/parse_options.sh b/t/lib/bash/parse_options.sh
index 00c8de65..a5daeffe 100644
--- a/t/lib/bash/parse_options.sh
+++ b/t/lib/bash/parse_options.sh
@@ -1,25 +1,81 @@
 #!/usr/bin/env bash
 
-TESTS=17
+TESTS=37
 
+TMPFILE="$TEST_TMPDIR/parse-opts-output"
+
+source "$LIB_DIR/log_warn_die.sh"
 source "$LIB_DIR/parse_options.sh"
 
-parse_options "$T_LIB_DIR/samples/bash/po001.sh"
+# ############################################################################
+# Parse options from POD using all default values.
+# ############################################################################
 
-is "$THRESHOLD" "100"
-is "$VARIABLE" "Threads_connected"
-is "$CYCLES" "1"
-is "$GDB" "no"
-is "$OPROFILE" "yes"
-is "$STRACE" "no"
-is "$TCPDUMP" "yes"
-is "$EMAIL" ""
-is "$INTERVAL" "30"
-is "$MAYBE_EMPTY" "no"
-is "$COLLECT" "${HOME}/bin/pt-collect"
-is "$DEST" "${HOME}/collected/"
-is "$DURATION" "30"
-is "$SLEEP" "300"
-is "$PCT_THRESHOLD" "95"
-is "$MB_THRESHOLD" "100"
-is "$PURGE" "30"
+parse_options "$T_LIB_DIR/samples/bash/po001.sh" "" 2>$TMPFILE
+
+TEST_NAME="No warnings or errors"
+is "`cat $TMPFILE`" ""
+
+TEST_NAME="Default opts"
+is "$OPT_THRESHOLD" "100"
+is "$OPT_VARIABLE" "Threads_connected"
+is "$OPT_CYCLES" "1"
+is "$OPT_GDB" "no"
+is "$OPT_OPROFILE" "yes"
+is "$OPT_STRACE" "no"
+is "$OPT_TCPDUMP" "yes"
+is "$OPT_EMAIL" ""
+is "$OPT_INTERVAL" "30"
+is "$OPT_MAYBE_EMPTY" "no"
+is "$OPT_COLLECT" "${HOME}/bin/pt-collect"
+is "$OPT_DEST" "${HOME}/collected/"
+is "$OPT_DURATION" "30"
+is "$OPT_SLEEP" "300"
+is "$OPT_PCT_THRESHOLD" "95"
+is "$OPT_MB_THRESHOLD" "100"
+is "$OPT_PURGE" "30"
+
+# ############################################################################
+# Specify some opts, but use default values for the rest.
+# ############################################################################
+
+parse_options "$T_LIB_DIR/samples/bash/po001.sh" --threshold 50 --gdb yes --email user@example.com
+
+TEST_NAME="User-specified opts with defaults"
+is "$OPT_THRESHOLD" "50" # specified
+is "$OPT_VARIABLE" "Threads_connected"
+is "$OPT_CYCLES" "1"
+is "$OPT_GDB" "yes" # specified
+is "$OPT_OPROFILE" "yes"
+is "$OPT_STRACE" "no"
+is "$OPT_TCPDUMP" "yes"
+is "$OPT_EMAIL" "user@example.com" # specified
+is "$OPT_INTERVAL" "30"
+is "$OPT_MAYBE_EMPTY" "no"
+is "$OPT_COLLECT" "${HOME}/bin/pt-collect"
+is "$OPT_DEST" "${HOME}/collected/"
+is "$OPT_DURATION" "30"
+is "$OPT_SLEEP" "300"
+is "$OPT_PCT_THRESHOLD" "95"
+is "$OPT_MB_THRESHOLD" "100"
+is "$OPT_PURGE" "30"
+
+# ############################################################################
+# An unknown option should produce an error.
+# ############################################################################
+
+# Have to call this in a subshell because the error will cause an exit.
+(
+   parse_options "$T_LIB_DIR/samples/bash/po001.sh" --foo >$TMPFILE 2>&1
+)
+local err=$?
+TEST_NAME="Non-zero exit on unknown option"
+is "$err" "1"
+
+TEST_NAME="Error on unknown option"
+cmd_ok "grep -q 'Unknown option: foo' $TMPFILE"
+
+# ############################################################################
+# Done
+# ############################################################################
+exit
diff --git a/t/lib/bash/tmpdir.sh b/t/lib/bash/tmpdir.sh
index 1a7d5809..83708652 100644
--- a/t/lib/bash/tmpdir.sh
+++ b/t/lib/bash/tmpdir.sh
@@ -10,13 +10,13 @@ is "$TMPDIR" ""
 
 TEST_NAME="set_TMPDIR makes secure tmpdir"
 set_TMPDIR
-ok "test -d $TMPDIR"
+cmd_ok "test -d $TMPDIR"
 
 tmpdir=$TMPDIR;
 
 TEST_NAME="rm_TMPDIR"
 rm_TMPDIR
-ok "test ! -d $tmpdir"
+cmd_ok "test ! -d $tmpdir"
 
 TEST_NAME="rm_TMPDIR resets TMPDIR"
 is "$TMPDIR" "" 
@@ -28,17 +28,17 @@ TEST_NAME="TMPDIR not defined"
 is "$TMPDIR" ""
 
 TEST_NAME="--tmpdir does not exist yet"
-ok "test ! -d $OPT_TMPDIR"
+cmd_ok "test ! -d $OPT_TMPDIR"
 
 set_TMPDIR
 TEST_NAME="set_TMPDIR uses --tmpdir"
 is "$TMPDIR" "/tmp/use--tmpdir"
 
 TEST_NAME="set_TMPDIR creates --tmpdir"
-ok "test -d $TMPDIR"
+cmd_ok "test -d $TMPDIR"
 
 tmpdir=$TMPDIR;
 
 TEST_NAME="rm_TMPDIR removes --tmpdir"
 rm_TMPDIR
-ok "test ! -d $tmpdir"
+cmd_ok "test ! -d $tmpdir"
diff --git a/util/test-bash-functions b/util/test-bash-functions
index 901e818e..9a10a782 100755
--- a/util/test-bash-functions
+++ b/util/test-bash-functions
@@ -128,9 +128,9 @@ is() {
    result $?
 }
 
-ok() {
+cmd_ok() {
    local test_command=$1
-   $test_command
+   eval $test_command
    result $?
 }