diff --git a/owl_test.go b/owl_test.go
index 1e1cb3c..022d3a2 100644
--- a/owl_test.go
+++ b/owl_test.go
@@ -70,35 +70,3 @@ func TestRestrictRuneset(t *testing.T) {
 		}
 	}
 }
-
-func TestSortedPaths(t *testing.T) {
-	paths := []string{
-		"./testdata/Tawnee: The Game",
-		"./testdata/birds:/pengiuns?",
-		"./testdata/birds:/pengiuns?/emperor",
-		"./testdata/birds:/pengiuns?/pingu?",
-		"./testdata/birds:",
-	}
-	want := []string{
-		"./testdata/birds:/pengiuns?/emperor",
-		"./testdata/birds:/pengiuns?/pingu?",
-		"./testdata/birds:/pengiuns?",
-		"./testdata/Tawnee: The Game",
-		"./testdata/birds:",
-	}
-	have := sortedPaths(paths)
-	if len(have) > len(want) {
-		t.Fatal("Sorted list is bigger than original")
-	} else if len(have) < len(want) {
-		t.Fatal("Sorted list is smaller than original")
-	}
-	for index, path := range have {
-		if index >= len(want) || path != want[index] {
-			t.Fatalf(
-				"Want: %s\nHave: %s\n",
-				sliceToString(want),
-				sliceToString(have),
-			)
-		}
-	}
-}
diff --git a/test.bash b/test.bash
new file mode 100755
index 0000000..2ffe151
--- /dev/null
+++ b/test.bash
@@ -0,0 +1,76 @@
+#!/bin/sh
+
+# Exit on error
+set -e
+# Remove all the test files when we're done
+trap owltest_teardown EXIT
+
+# Check PWD
+if [ "$(basename $PWD)" != owl ]; then
+    echo 'Run this from project top level, i.e. "owl"'
+    exit 1
+fi
+
+export OWL_START=$PWD
+export OWL_TESTDATA=$PWD/testdata
+
+# Runes that I don't want to write
+export mouse_emoji=$'\U0001F401'
+export germany_emoji=$'\U0001F1E9\U0001F1EA'
+export bird_emoji=$'\U0001f426'
+# 猫头鹰
+export chinese_simplfied_owl=$'\u732B\u5934\u9E70'
+
+owltest_setup() {
+    mkdir "$OWL_TESTDATA"
+    cd "$OWL_TESTDATA"
+    mkdir -p 'birds:/pengu?ns' 'ascii_dir'
+    touch \
+        'no-change-needed' \
+        'So * many* *** *c*veats' \
+        '::>?' \
+        '<>??' \
+        'birds:/tawny: the game' \
+        'birds:/pengu?ns/pingu?' \
+        'birds:/pengu?ns/rockhopper' \
+        'birds:/pengu?ns/rockhopper?' \
+        "Mouse? ${mouse_emoji}" \
+        "Deustchland, Deutschland! ${germany_emoji}" \
+        "${chinese_simplfied_owl}" \
+        'Question? Why' \
+        'QUESTION: WHY'
+}
+
+owltest_teardown() {
+    cd "$OWL_START"
+    rm -r "$OWL_TESTDATA"
+}
+
+owltest_reset() {
+    owltest_teardown
+    owltest_setup
+}
+
+owl() {
+    $OWL_START/owl $@
+}
+
+unicode_rune() {
+    printf "\U$(printf '%08s' $1)\n"
+}
+
+# Help message
+cat <<-EOF
+Testing script; use this to:
+  - use the owl executable in this directory as just 'owl'
+  - have a set of files and directories to test out owl with
+This will be a lot easier if you have 'tree' installed; see README.md
+for details.
+
+You will now be in ${OWL_TESTDATA}; cd out and delete this directory to 
+clean up after a test. Or run owltest_reset to do the same in-place.
+EOF
+
+export -f owltest_setup owltest_reset owltest_teardown owl unicode_rune
+owltest_setup
+bash -i