diff --git a/test/test-combine.js b/test/test-combine.js
index 0c384da..cdf4574 100644
--- a/test/test-combine.js
+++ b/test/test-combine.js
@@ -26,7 +26,12 @@ var common  = require( './common' ),
     assert  = require( 'assert' ),
     Class   = common.require( 'class' ),
     Script  = process.binding( 'evals' ).Script,
-    sandbox = {};
+
+    // sandbox in which combined script will be run
+    sandbox = {
+        // stub document.write() so we don't blow up
+        document: { write: function() {} },
+    };
 
 
 var files = [ 'ease.js', 'ease-full.js' ],
diff --git a/tools/browser-test.html b/tools/browser-test.html
index 938505d..86eb485 100644
--- a/tools/browser-test.html
+++ b/tools/browser-test.html
@@ -24,7 +24,7 @@
       catch ( e )
       {
           body.style.color = 'red';
-          body.innerHTML = '<p>' + e.message + '</p>' +
+          body.innerHTML += '<p>' + e.message + '</p>' +
               '<p><em>ease.js is not guaranteed to run properly within this ' +
               'browser.</em></p>' +
               '<p>If building ease.js, remember to run <tt>`make combine` ' +
diff --git a/tools/combine b/tools/combine
index e6cd1b4..50b01b7 100755
--- a/tools/combine
+++ b/tools/combine
@@ -127,6 +127,10 @@ if [ "$INC_TEST" ]; then
         echo "{"
         echo "    var exports = module.exports = {};"
 
+        # write out current test to make debugging easier in browsers with very
+        # little debugging support
+        echo "    document.write( '$module...<br />' )"
+
         # add the module, removing trailing commas
         cat $filename | $RMTRAIL