diff --git a/.gitignore b/.gitignore
index e942ea940..def8186d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,4 @@ bower_components
 *.map
 sslkeylogfile.log
 .tox/
+.vscode
diff --git a/mitmproxy/addons/filestreamer.py b/mitmproxy/addons/filestreamer.py
index 031b44ab6..92224d217 100644
--- a/mitmproxy/addons/filestreamer.py
+++ b/mitmproxy/addons/filestreamer.py
@@ -21,23 +21,23 @@ class FileStreamer:
 
     def configure(self, options, updated):
         # We're already streaming - stop the previous stream and restart
-        if self.stream:
-            self.done()
-
-        if options.outfile:
-            flt = None
-            if options.get("filtstr"):
-                flt = flowfilter.parse(options.filtstr)
-                if not flt:
-                    raise exceptions.OptionsError(
-                        "Invalid filter specification: %s" % options.filtstr
-                    )
-            path, mode = options.outfile
-            if mode not in ("wb", "ab"):
-                raise exceptions.OptionsError("Invalid mode.")
-            err = self.start_stream_to_path(path, mode, flt)
-            if err:
-                raise exceptions.OptionsError(err)
+        if "outfile" in updated:
+            if self.stream:
+                self.done()
+            if options.outfile:
+                flt = None
+                if options.get("filtstr"):
+                    flt = flowfilter.parse(options.filtstr)
+                    if not flt:
+                        raise exceptions.OptionsError(
+                            "Invalid filter specification: %s" % options.filtstr
+                        )
+                path, mode = options.outfile
+                if mode not in ("wb", "ab"):
+                    raise exceptions.OptionsError("Invalid mode.")
+                err = self.start_stream_to_path(path, mode, flt)
+                if err:
+                    raise exceptions.OptionsError(err)
 
     def tcp_start(self, flow):
         if self.stream:
diff --git a/test/mitmproxy/addons/test_filestreamer.py b/test/mitmproxy/addons/test_filestreamer.py
index 28094c436..f86912fca 100644
--- a/test/mitmproxy/addons/test_filestreamer.py
+++ b/test/mitmproxy/addons/test_filestreamer.py
@@ -1,44 +1,32 @@
 from mitmproxy.test import tflow
 from mitmproxy.test import tutils
-
-from .. import mastertest
+from mitmproxy.test import taddons
 
 import os.path
-
 from mitmproxy.addons import filestreamer
-from mitmproxy import master
 from mitmproxy import io
-from mitmproxy import options
-from mitmproxy import proxy
 
 
-class TestStream(mastertest.MasterTest):
-    def test_stream(self):
+def test_stream():
+    sa = filestreamer.FileStreamer()
+    with taddons.context() as tctx:
         with tutils.tmpdir() as tdir:
             p = os.path.join(tdir, "foo")
 
             def r():
-                r = io.FlowReader(open(p, "rb"))
-                return list(r.stream())
+                x = io.FlowReader(open(p, "rb"))
+                return list(x.stream())
 
-            o = options.Options(
-                outfile = (p, "wb")
-            )
-            m = master.Master(o, proxy.DummyServer())
-            sa = filestreamer.FileStreamer()
+            tctx.configure(sa, outfile=(p, "wb"))
 
-            m.addons.add(sa)
             f = tflow.tflow(resp=True)
-            m.request(f)
-            m.response(f)
-            m.addons.remove(sa)
-
+            sa.request(f)
+            sa.response(f)
+            tctx.configure(sa, outfile=None)
             assert r()[0].response
 
-            m.options.outfile = (p, "ab")
-
-            m.addons.add(sa)
+            tctx.configure(sa, outfile=(p, "ab"))
             f = tflow.tflow()
-            m.request(f)
-            m.addons.remove(sa)
+            sa.request(f)
+            tctx.configure(sa, outfile=None)
             assert not r()[1].response