diff --git a/src/utils.xqy b/src/utils.xqy
index 5a1f356..e8e5260 100644
--- a/src/utils.xqy
+++ b/src/utils.xqy
@@ -6,7 +6,25 @@ declare namespace test = "http://github.com/robwhitby/xray/test";
 import module namespace parser = "XQueryML10" at "parsers/XQueryML10.xq";
 
 declare private variable $test-ns-uri := fn:namespace-uri-for-prefix("test", <test:x/>);
+
   
+declare function utils:get-modules(
+  $test-dir as xs:string,
+  $pattern as xs:string?
+) as xs:string*
+{
+  let $test-dir :=
+    if (xdmp:platform() eq "winnt")
+    then fn:replace($test-dir, "/", "\\")
+    else fn:replace($test-dir, "\\", "/")
+  let $fs-dir := fn:concat(xdmp:modules-root(), fn:replace($test-dir, "^[/\\]+", ""))
+  where utils:filesystem-directory-exists($fs-dir)
+  return
+    for $filepath in utils:get-filelist($fs-dir)
+    where fn:matches(utils:relative-path($filepath), fn:string($pattern))
+    return $filepath
+};
+
   
 declare function utils:get-filelist(
   $dir as xs:string
@@ -16,8 +34,8 @@ declare function utils:get-filelist(
   order by $entry/dir:type descending, $entry/dir:filename ascending
   return
     if ($entry/dir:type = "file")
-    then 
-      if (fn:matches($entry/dir:pathname, "\.xqy?$")) 
+    then
+      if (fn:matches($entry/dir:pathname, "\.xqy?$"))
       then $entry/dir:pathname/fn:string()
       else ()
     else utils:get-filelist($entry/dir:pathname/fn:string())
@@ -30,7 +48,7 @@ declare function utils:get-functions(
 {
   for $fn in utils:parse-xquery($module-path)//FunctionDecl
   let $qname := xs:QName($fn/FunctionName/QName)
-  let $qname := 
+  let $qname :=
     if (fn:namespace-uri-from-QName($qname) eq "") 
     then fn:QName($test-ns-uri, fn:local-name-from-QName($qname))
     else $qname
@@ -39,25 +57,11 @@ declare function utils:get-functions(
 };
 
 
-declare function utils:get-modules(
-  $test-dir as xs:string, 
-  $pattern as xs:string?
-) as xs:string*
-{
-  let $fs-dir := fn:concat(xdmp:modules-root(), fn:replace($test-dir, "^/+", ""))
-  where utils:filesystem-directory-exists($fs-dir)
-  return
-    for $filepath in utils:get-filelist($fs-dir)
-    where fn:matches(utils:relative-path($filepath), $pattern)
-    return $filepath
-};
-
-
 declare function utils:relative-path(
   $path as xs:string
 ) as xs:string
 {
-  fn:replace($path, xdmp:modules-root(), "/")
+  fn:substring($path, fn:string-length(xdmp:modules-root()))
 };
 
 
@@ -90,7 +94,7 @@ declare function utils:transform(
 };
 
 
-declare function utils:parse-xquery(
+declare private function utils:parse-xquery(
   $module-path as xs:string
 ) as element(XQuery)?
 {
diff --git a/src/xray.xqy b/src/xray.xqy
index 371f3fc..9df24b0 100644
--- a/src/xray.xqy
+++ b/src/xray.xqy
@@ -11,7 +11,7 @@ declare function xray:run-tests(
   $module-pattern as xs:string?, 
   $test-pattern as xs:string?, 
   $format as xs:string?
-) 
+) as item()*
 {
   let $modules := utils:get-modules($test-dir, fn:string($module-pattern))
   let $tests := 
@@ -44,11 +44,7 @@ declare function xray:run-test(
 ) as element(test) 
 {
   let $ignore := fn:starts-with(utils:get-local-name($fn), "IGNORE")
-  let $test :=
-    if ($ignore) then () 
-    else 
-      try { xray:apply($fn) }
-      catch($ex) { element exception { xray:error($ex)} }
+  let $test := if ($ignore) then () else xray:apply($fn)
   return element test {
     attribute name { utils:get-local-name($fn) },
     attribute result { 
@@ -71,26 +67,32 @@ declare function xray:test-response(
   element assert {
     attribute test { $assertion },
     attribute result { if ($passed) then "passed" else "failed" },
-    element xray:actual { $actual },
-    element xray:expected { $expected }
+    element actual { $actual },
+    element expected { $expected }
   }
 };
 
 
-declare function xray:apply($function as xdmp:function)
+declare private function xray:apply(
+  $function as xdmp:function
+) as item()*
 {
-  xdmp:eval("
-    declare variable $fn as xdmp:function external; 
-    declare option xdmp:update 'true';
-    xdmp:apply($fn)",
-    (fn:QName("","fn"), $function),
-    <options xmlns="xdmp:eval"><isolation>different-transaction</isolation></options>
-  )
+  try {
+    xdmp:eval("
+      declare variable $fn as xdmp:function external;
+      declare option xdmp:update 'true';
+      xdmp:apply($fn)",
+      (fn:QName("","fn"), $function),
+      <options xmlns="xdmp:eval"><isolation>different-transaction</isolation></options>
+    )
+  }
+  catch($ex) { element exception { xray:error($ex)} }
 };
 
 
-declare function xray:error($ex as element(error:error)) 
-as element(error:error)
+declare private function xray:error(
+  $ex as element(error:error)
+) as element(error:error)
 {
   $ex
 };