diff --git a/HISTORY b/HISTORY
index 21d467a..ade78da 100644
--- a/HISTORY
+++ b/HISTORY
@@ -5,8 +5,11 @@ Version 0.0.3
 ---------------------
 General tidying
 
-Run with different shells
+Run with different shells in three ways
 
+* urchin -s
+* $TEST_SHELL variable with $TEST_SHELL
+* $TEST_SHELL variable with urchin -sh
 
 Before version 0.0.3
 ----------------------
diff --git a/package.json b/package.json
index 7084a5b..0924587 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "test": "tests"
   },
   "scripts": {
-    "test": "./urchin tests"
+    "test": "export PATH=\"$PWD:$PATH\" && urchin tests"
   },
   "bin": "./urchin",
   "repository": {
diff --git a/tests/urchin -sh should start the $TEST_SHELL. b/tests/urchin -sh should start the $TEST_SHELL.
new file mode 100755
index 0000000..8045b16
--- /dev/null
+++ b/tests/urchin -sh should start the $TEST_SHELL.	
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+test c = $(echo 'echo $3' | urchin -sh a 'b b b b' c d e)
diff --git a/urchin b/urchin
index af71b7b..4f19260 100755
--- a/urchin
+++ b/urchin
@@ -169,6 +169,10 @@ do
           shell_for_sh_tests=$1
           which "$shell_for_sh_tests" >/dev/null || { echo "Cannot find specified shell: '$shell_for_sh_tests'" >&2; urchin_help >&2; exit 2; }
           ;;
+        -sh) # `urchin -sh` is equivalent to "$TEST_SHELL"
+          urchinsh=${TEST_SHELL:-/bin/sh}
+          "$urchinsh" "$@"
+          exit $?;;
         -h|--help) urchin_help
           exit 0;;
         -*) urchin_help >&2