diff --git a/src/run-test b/src/run-test
index 4afcc79..2c445b1 100755
--- a/src/run-test
+++ b/src/run-test
@@ -8,6 +8,7 @@
 # 
 # 
 
+MINIMODEM="${MINIMODEM-./minimodem}"
 
 TMPDIR=/tmp/run-test-$$
 mkdir "$TMPDIR" || exit
@@ -26,8 +27,8 @@ do
     txtnum="${i##*/}"
     txtnum="${txtnum%%-*}"
 
-    echo TEST	./minimodem -f "$i" "$rate" 
-    ./minimodem -f "$i" "$rate"  >$TMPDIR/out 2>$TMPDIR/err
+    echo TEST	$MINIMODEM -f "$i" "$rate" 
+    $MINIMODEM -f "$i" "$rate"  >$TMPDIR/out 2>$TMPDIR/err
 
     t="${f%%-*}"
 
diff --git a/src/self-test b/src/self-test
index 0dc7c30..dfb15b8 100755
--- a/src/self-test
+++ b/src/self-test
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+MINIMODEM="${MINIMODEM-./minimodem}"
+
 [ $# -eq 2 ] || {
     echo "usage: self-test baudmode textfile" 1>&2
     exit 1
@@ -11,7 +13,7 @@ TMPF="/tmp/minimodem-test-$$.wav"
 trap "rm -f $TMPF" 0
 
 set -e
-./minimodem --tx --file $TMPF "$baudmode" < "$textfile"
+$MINIMODEM --tx --file $TMPF "$baudmode" < "$textfile"
 # ls -l $TMPF
-./minimodem --rx --file $TMPF "$baudmode" | diff "$textfile" -
+$MINIMODEM --rx --file $TMPF "$baudmode" | diff "$textfile" -