diff --git a/lib/results.js b/lib/results.js
index 56fdc4ba..0531a101 100644
--- a/lib/results.js
+++ b/lib/results.js
@@ -24,6 +24,7 @@ function Results () {
     this._stream = through();
     this.tests = [];
     this._only = null;
+    this._isRunning = false;
 }
 
 Results.prototype.createStream = function (opts) {
@@ -65,14 +66,17 @@ Results.prototype.createStream = function (opts) {
         self._stream.pipe(output);
     }
 
-    nextTick(function next() {
-        var t;
-        while (t = getNextTest(self)) {
-            t.run();
-            if (!t.ended) return t.once('end', function(){ nextTick(next); });
-        }
-        self.emit('done');
-    });
+    if (!this._isRunning) {
+        this._isRunning = true;
+        nextTick(function next() {
+            var t;
+            while (t = getNextTest(self)) {
+                t.run();
+                if (!t.ended) return t.once('end', function(){ nextTick(next); });
+            }
+            self.emit('done');
+        });
+    }
 
     return output;
 };