diff --git a/.eslintignore b/.eslintignore
index ca00d1c8f563..39f78f8deab5 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -115,7 +115,6 @@ devtools/server/tests/browser/**
 devtools/server/tests/mochitest/**
 devtools/server/tests/unit/**
 devtools/shared/heapsnapshot/**
-devtools/shared/transport/tests/unit/**
 devtools/shared/webconsole/test/**
 
 # Ignore devtools pre-processed files
diff --git a/devtools/shared/transport/tests/unit/head_dbg.js b/devtools/shared/transport/tests/unit/head_dbg.js
index 1f96ad440e01..32ba4981314d 100644
--- a/devtools/shared/transport/tests/unit/head_dbg.js
+++ b/devtools/shared/transport/tests/unit/head_dbg.js
@@ -3,6 +3,10 @@
 
 "use strict";
 
+/* exported Cr, CC, NetUtil, defer, errorCount, initTestDebuggerServer,
+            writeTestTempFile, socket_transport, local_transport, really_long
+*/
+
 var Cc = Components.classes;
 var Ci = Components.interfaces;
 var Cu = Components.utils;
@@ -17,7 +21,6 @@ const defer = require("devtools/shared/defer");
 const { Task } = require("devtools/shared/task");
 
 const Services = require("Services");
-const DevToolsUtils = require("devtools/shared/DevToolsUtils");
 
 // We do not want to log packets by default, because in some tests,
 // we can be sending large amounts of data. The test harness has
@@ -31,27 +34,21 @@ Services.prefs.setBoolPref("devtools.debugger.remote-enabled", true);
 const { DebuggerServer } = require("devtools/server/main");
 const { DebuggerClient } = require("devtools/shared/client/main");
 
-function testExceptionHook(ex) {
-  try {
-    do_report_unexpected_exception(ex);
-  } catch (ex) {
-    return {throw: ex};
-  }
-  return undefined;
-}
-
-// Convert an nsIScriptError 'aFlags' value into an appropriate string.
-function scriptErrorFlagsToKind(aFlags) {
-  var kind;
-  if (aFlags & Ci.nsIScriptError.warningFlag)
+// Convert an nsIScriptError 'flags' value into an appropriate string.
+function scriptErrorFlagsToKind(flags) {
+  let kind;
+  if (flags & Ci.nsIScriptError.warningFlag) {
     kind = "warning";
-  if (aFlags & Ci.nsIScriptError.exceptionFlag)
+  }
+  if (flags & Ci.nsIScriptError.exceptionFlag) {
     kind = "exception";
-  else
+  } else {
     kind = "error";
+  }
 
-  if (aFlags & Ci.nsIScriptError.strictFlag)
+  if (flags & Ci.nsIScriptError.strictFlag) {
     kind = "strict " + kind;
+  }
 
   return kind;
 }
@@ -60,23 +57,24 @@ function scriptErrorFlagsToKind(aFlags) {
 // into the ether.
 var errorCount = 0;
 var listener = {
-  observe: function (aMessage) {
+  observe: function (message) {
     errorCount++;
+    let string = "";
     try {
       // If we've been given an nsIScriptError, then we can print out
       // something nicely formatted, for tools like Emacs to pick up.
-      var scriptError = aMessage.QueryInterface(Ci.nsIScriptError);
-      dump(aMessage.sourceName + ":" + aMessage.lineNumber + ": " +
-           scriptErrorFlagsToKind(aMessage.flags) + ": " +
-           aMessage.errorMessage + "\n");
-      var string = aMessage.errorMessage;
+      message.QueryInterface(Ci.nsIScriptError);
+      dump(message.sourceName + ":" + message.lineNumber + ": " +
+           scriptErrorFlagsToKind(message.flags) + ": " +
+           message.errorMessage + "\n");
+      string = message.errorMessage;
     } catch (x) {
       // Be a little paranoid with message, as the whole goal here is to lose
       // no information.
       try {
-        var string = "" + aMessage.message;
-      } catch (x) {
-        var string = "<error converting error message to string>";
+        string = message.message;
+      } catch (e) {
+        string = "<error converting error message to string>";
       }
     }
 
@@ -86,7 +84,7 @@ var listener = {
     }
 
     // Throw in most cases, but ignore the "strict" messages
-    if (!(aMessage.flags & Ci.nsIScriptError.strictFlag)) {
+    if (!(message.flags & Ci.nsIScriptError.strictFlag)) {
       do_throw("head_dbg.js got console message: " + string + "\n");
     }
   }
@@ -96,80 +94,6 @@ var consoleService = Cc["@mozilla.org/consoleservice;1"]
                      .getService(Ci.nsIConsoleService);
 consoleService.registerListener(listener);
 
-function check_except(func) {
-  try {
-    func();
-  } catch (e) {
-    do_check_true(true);
-    return;
-  }
-  dump("Should have thrown an exception: " + func.toString());
-  do_check_true(false);
-}
-
-function testGlobal(aName) {
-  let systemPrincipal = Cc["@mozilla.org/systemprincipal;1"]
-    .createInstance(Ci.nsIPrincipal);
-
-  let sandbox = Cu.Sandbox(systemPrincipal);
-  sandbox.__name = aName;
-  return sandbox;
-}
-
-function addTestGlobal(aName)
-{
-  let global = testGlobal(aName);
-  DebuggerServer.addTestGlobal(global);
-  return global;
-}
-
-// List the DebuggerClient |aClient|'s tabs, look for one whose title is
-// |aTitle|, and apply |aCallback| to the packet's entry for that tab.
-function getTestTab(aClient, aTitle, aCallback) {
-  aClient.listTabs(function (aResponse) {
-    for (let tab of aResponse.tabs) {
-      if (tab.title === aTitle) {
-        aCallback(tab);
-        return;
-      }
-    }
-    aCallback(null);
-  });
-}
-
-// Attach to |aClient|'s tab whose title is |aTitle|; pass |aCallback| the
-// response packet and a TabClient instance referring to that tab.
-function attachTestTab(aClient, aTitle, aCallback) {
-  getTestTab(aClient, aTitle, function (aTab) {
-    aClient.attachTab(aTab.actor, aCallback);
-  });
-}
-
-// Attach to |aClient|'s tab whose title is |aTitle|, and then attach to
-// that tab's thread. Pass |aCallback| the thread attach response packet, a
-// TabClient referring to the tab, and a ThreadClient referring to the
-// thread.
-function attachTestThread(aClient, aTitle, aCallback) {
-  attachTestTab(aClient, aTitle, function (aResponse, aTabClient) {
-    function onAttach(aResponse, aThreadClient) {
-      aCallback(aResponse, aTabClient, aThreadClient);
-    }
-    aTabClient.attachThread({ useSourceMaps: true }, onAttach);
-  });
-}
-
-// Attach to |aClient|'s tab whose title is |aTitle|, attach to the tab's
-// thread, and then resume it. Pass |aCallback| the thread's response to
-// the 'resume' packet, a TabClient for the tab, and a ThreadClient for the
-// thread.
-function attachTestTabAndResume(aClient, aTitle, aCallback) {
-  attachTestThread(aClient, aTitle, function (aResponse, aTabClient, aThreadClient) {
-    aThreadClient.resume(function (aResponse) {
-      aCallback(aResponse, aTabClient, aThreadClient);
-    });
-  });
-}
-
 /**
  * Initialize the testing debugger server.
  */
@@ -184,35 +108,6 @@ function initTestDebuggerServer() {
   DebuggerServer.init();
 }
 
-function finishClient(aClient) {
-  aClient.close().then(function () {
-    do_test_finished();
-  });
-}
-
-/**
- * Takes a relative file path and returns the absolute file url for it.
- */
-function getFileUrl(aName, aAllowMissing = false) {
-  let file = do_get_file(aName, aAllowMissing);
-  return Services.io.newFileURI(file).spec;
-}
-
-/**
- * Returns the full path of the file with the specified name in a
- * platform-independent and URL-like form.
- */
-function getFilePath(aName, aAllowMissing = false) {
-  let file = do_get_file(aName, aAllowMissing);
-  let path = Services.io.newFileURI(file).spec;
-  let filePrePath = "file://";
-  if ("nsILocalFileWin" in Ci &&
-      file instanceof Ci.nsILocalFileWin) {
-    filePrePath += "/";
-  }
-  return path.slice(filePrePath.length);
-}
-
 /**
  * Wrapper around do_get_file to prefix files with the name of current test to
  * avoid collisions when running in parallel.
@@ -224,16 +119,16 @@ function getTestTempFile(fileName, allowMissing) {
   return do_get_file(fileName + "-" + thisTest, allowMissing);
 }
 
-function writeTestTempFile(aFileName, aContent) {
-  let file = getTestTempFile(aFileName, true);
+function writeTestTempFile(fileName, content) {
+  let file = getTestTempFile(fileName, true);
   let stream = Cc["@mozilla.org/network/file-output-stream;1"]
     .createInstance(Ci.nsIFileOutputStream);
   stream.init(file, -1, -1, 0);
   try {
     do {
-      let numWritten = stream.write(aContent, aContent.length);
-      aContent = aContent.slice(numWritten);
-    } while (aContent.length > 0);
+      let numWritten = stream.write(content, content.length);
+      content = content.slice(numWritten);
+    } while (content.length > 0);
   } finally {
     stream.close();
   }
@@ -248,10 +143,10 @@ var socket_transport = Task.async(function* () {
     authenticator.allowConnection = () => {
       return DebuggerServer.AuthenticationResult.ALLOW;
     };
-    let listener = DebuggerServer.createListener();
-    listener.portOrPath = -1;
-    listener.authenticator = authenticator;
-    yield listener.open();
+    let debuggerListener = DebuggerServer.createListener();
+    debuggerListener.portOrPath = -1;
+    debuggerListener.authenticator = authenticator;
+    yield debuggerListener.open();
   }
   let port = DebuggerServer._listeners[0].port;
   do_print("Debugger server port is " + port);
diff --git a/devtools/shared/transport/tests/unit/test_bulk_error.js b/devtools/shared/transport/tests/unit/test_bulk_error.js
index 9544992919bb..1b2c16b2ca4e 100644
--- a/devtools/shared/transport/tests/unit/test_bulk_error.js
+++ b/devtools/shared/transport/tests/unit/test_bulk_error.js
@@ -73,8 +73,8 @@ function json_reply(client, response) {
   // Send bulk data to server
   let copyDeferred = defer();
   request.on("bulk-send-ready", ({writer, done}) => {
-    let input = Cc["@mozilla.org/io/string-input-stream;1"].
-                  createInstance(Ci.nsIStringInputStream);
+    let input = Cc["@mozilla.org/io/string-input-stream;1"]
+                  .createInstance(Ci.nsIStringInputStream);
     input.setData(reallyLong, reallyLong.length);
     try {
       writer.copyFrom(input, () => {
diff --git a/devtools/shared/transport/tests/unit/test_client_server_bulk.js b/devtools/shared/transport/tests/unit/test_client_server_bulk.js
index e4d17d216f6f..7264787f68a5 100644
--- a/devtools/shared/transport/tests/unit/test_client_server_bulk.js
+++ b/devtools/shared/transport/tests/unit/test_client_server_bulk.js
@@ -150,6 +150,18 @@ var test_bulk_request_cs = Task.async(function* (transportFactory, actorType, re
     client.listTabs(clientDeferred.resolve);
   });
 
+  function bulkSendReadyCallback({copyFrom}) {
+    NetUtil.asyncFetch({
+      uri: NetUtil.newURI(getTestTempFile("bulk-input")),
+      loadUsingSystemPrincipal: true
+    }, input => {
+      copyFrom(input).then(() => {
+        input.close();
+        bulkCopyDeferred.resolve();
+      });
+    });
+  }
+
   clientDeferred.promise.then(response => {
     let request = client.startBulkRequest({
       actor: response.testBulk,
@@ -158,17 +170,7 @@ var test_bulk_request_cs = Task.async(function* (transportFactory, actorType, re
     });
 
     // Send bulk data to server
-    request.on("bulk-send-ready", ({copyFrom}) => {
-      NetUtil.asyncFetch({
-        uri: NetUtil.newURI(getTestTempFile("bulk-input")),
-        loadUsingSystemPrincipal: true
-      }, input => {
-        copyFrom(input).then(() => {
-          input.close();
-          bulkCopyDeferred.resolve();
-        });
-      });
-    });
+    request.on("bulk-send-ready", bulkSendReadyCallback);
 
     // Set up reply handling for this type
     replyHandlers[replyType](request).then(() => {
diff --git a/devtools/shared/transport/tests/unit/test_dbgsocket.js b/devtools/shared/transport/tests/unit/test_dbgsocket.js
index 79111f87752c..5ec34b0b9fe4 100644
--- a/devtools/shared/transport/tests/unit/test_dbgsocket.js
+++ b/devtools/shared/transport/tests/unit/test_dbgsocket.js
@@ -1,11 +1,11 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 var gPort;
 var gExtraListener;
 
-function run_test()
-{
+function run_test() {
   do_print("Starting test at " + new Date().toTimeString());
   initTestDebuggerServer();
 
@@ -16,8 +16,7 @@ function run_test()
   run_next_test();
 }
 
-function* test_socket_conn()
-{
+function* test_socket_conn() {
   do_check_eq(DebuggerServer.listeningSockets, 0);
   let AuthenticatorType = DebuggerServer.Authenticators.get("PROMPT");
   let authenticator = new AuthenticatorType.Server();
@@ -53,9 +52,9 @@ function* test_socket_conn()
 
   let closedDeferred = defer();
   transport.hooks = {
-    onPacket: function (aPacket) {
-      this.onPacket = function (aPacket) {
-        do_check_eq(aPacket.unicode, unicodeString);
+    onPacket: function (packet) {
+      this.onPacket = function ({unicode}) {
+        do_check_eq(unicode, unicodeString);
         transport.close();
       };
       // Verify that things work correctly when bigger than the output
@@ -64,9 +63,9 @@ function* test_socket_conn()
                       type: "echo",
                       reallylong: really_long(),
                       unicode: unicodeString});
-      do_check_eq(aPacket.from, "root");
+      do_check_eq(packet.from, "root");
     },
-    onClosed: function (aStatus) {
+    onClosed: function (status) {
       closedDeferred.resolve();
     },
   };
@@ -74,8 +73,7 @@ function* test_socket_conn()
   return closedDeferred.promise;
 }
 
-function* test_socket_shutdown()
-{
+function* test_socket_shutdown() {
   do_check_eq(DebuggerServer.listeningSockets, 2);
   gExtraListener.close();
   do_check_eq(DebuggerServer.listeningSockets, 1);
@@ -87,7 +85,7 @@ function* test_socket_shutdown()
 
   do_print("Connecting to a server socket at " + new Date().toTimeString());
   try {
-    let transport = yield DebuggerClient.socketConnect({
+    yield DebuggerClient.socketConnect({
       host: "127.0.0.1",
       port: gPort
     });
@@ -98,24 +96,22 @@ function* test_socket_shutdown()
       // machines it may just time out.
       do_check_true(true);
       return;
-    } else {
-      throw e;
     }
+    throw e;
   }
 
   // Shouldn't reach this, should never connect.
   do_check_true(false);
 }
 
-function test_pipe_conn()
-{
+function test_pipe_conn() {
   let transport = DebuggerServer.connectPipe();
   transport.hooks = {
-    onPacket: function (aPacket) {
-      do_check_eq(aPacket.from, "root");
+    onPacket: function (packet) {
+      do_check_eq(packet.from, "root");
       transport.close();
     },
-    onClosed: function (aStatus) {
+    onClosed: function (status) {
       run_next_test();
     }
   };
diff --git a/devtools/shared/transport/tests/unit/test_dbgsocket_connection_drop.js b/devtools/shared/transport/tests/unit/test_dbgsocket_connection_drop.js
index 9221939b15d4..58be24cba876 100644
--- a/devtools/shared/transport/tests/unit/test_dbgsocket_connection_drop.js
+++ b/devtools/shared/transport/tests/unit/test_dbgsocket_connection_drop.js
@@ -7,6 +7,7 @@
  * Bug 755412 - checks if the server drops the connection on an improperly
  * framed packet, i.e. when the length header is invalid.
  */
+"use strict";
 
 const { RawPacket } = require("devtools/shared/transport/packets");
 
@@ -61,8 +62,8 @@ var test_helper = Task.async(function* (payload) {
   });
   let closedDeferred = defer();
   transport.hooks = {
-    onPacket: function (aPacket) {
-      this.onPacket = function (aPacket) {
+    onPacket: function (packet) {
+      this.onPacket = function () {
         do_throw(new Error("This connection should be dropped."));
         transport.close();
       };
@@ -71,7 +72,7 @@ var test_helper = Task.async(function* (payload) {
       transport._outgoing.push(new RawPacket(transport, payload));
       transport._flushOutgoing();
     },
-    onClosed: function (aStatus) {
+    onClosed: function (status) {
       do_check_true(true);
       closedDeferred.resolve();
     },
diff --git a/devtools/shared/transport/tests/unit/test_delimited_read.js b/devtools/shared/transport/tests/unit/test_delimited_read.js
index a5a7baf7b32e..d7edb3e46d01 100644
--- a/devtools/shared/transport/tests/unit/test_delimited_read.js
+++ b/devtools/shared/transport/tests/unit/test_delimited_read.js
@@ -1,5 +1,6 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 const StreamUtils = require("devtools/shared/transport/stream-utils");
 
diff --git a/devtools/shared/transport/tests/unit/test_no_bulk.js b/devtools/shared/transport/tests/unit/test_no_bulk.js
index f621a2a52f76..a4804c751ee8 100644
--- a/devtools/shared/transport/tests/unit/test_no_bulk.js
+++ b/devtools/shared/transport/tests/unit/test_no_bulk.js
@@ -20,7 +20,6 @@ function run_test() {
 /** * Tests ***/
 
 var test_bulk_send_error = Task.async(function* (transportFactory) {
-  let deferred = defer();
   let transport = yield transportFactory();
 
   let client = new DebuggerClient(transport);
@@ -33,6 +32,5 @@ var test_bulk_send_error = Task.async(function* (transportFactory) {
     } catch (e) {
       do_check_true(true);
     }
-
   });
 });
diff --git a/devtools/shared/transport/tests/unit/test_packet.js b/devtools/shared/transport/tests/unit/test_packet.js
index 7e1896555d6d..28e87da987cc 100644
--- a/devtools/shared/transport/tests/unit/test_packet.js
+++ b/devtools/shared/transport/tests/unit/test_packet.js
@@ -1,5 +1,6 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 const { JSONPacket, BulkPacket } =
   require("devtools/shared/transport/packets");
diff --git a/devtools/shared/transport/tests/unit/test_transport_bulk.js b/devtools/shared/transport/tests/unit/test_transport_bulk.js
index a21216acf582..66bba356a1ed 100644
--- a/devtools/shared/transport/tests/unit/test_transport_bulk.js
+++ b/devtools/shared/transport/tests/unit/test_transport_bulk.js
@@ -74,9 +74,9 @@ var test_bulk_transfer_transport = Task.async(function* (transportFactory) {
 
   // Client
   transport.hooks = {
-    onPacket: function (aPacket) {
+    onPacket: function (packet) {
       // We've received the initial start up packet
-      do_check_eq(aPacket.from, "root");
+      do_check_eq(packet.from, "root");
 
       // Server
       do_check_eq(Object.keys(DebuggerServer._connections).length, 1);
diff --git a/devtools/shared/transport/tests/unit/testactors-no-bulk.js b/devtools/shared/transport/tests/unit/testactors-no-bulk.js
index d2c8193fe57a..14a5f2c6efbf 100644
--- a/devtools/shared/transport/tests/unit/testactors-no-bulk.js
+++ b/devtools/shared/transport/tests/unit/testactors-no-bulk.js
@@ -1,5 +1,6 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 const { RootActor } = require("devtools/server/actors/root");
 const { DebuggerServer } = require("devtools/server/main");
@@ -7,8 +8,8 @@ const { DebuggerServer } = require("devtools/server/main");
 /**
  * Root actor that doesn't have the bulk trait.
  */
-function createRootActor(aConnection) {
-  let root = new RootActor(aConnection, {
+function createRootActor(connection) {
+  let root = new RootActor(connection, {
     globalActorFactories: DebuggerServer.globalActorFactories
   });
   root.applicationType = "xpcshell-tests";
diff --git a/devtools/shared/transport/tests/unit/testactors.js b/devtools/shared/transport/tests/unit/testactors.js
index 80d5d4e18abe..37d0158c667d 100644
--- a/devtools/shared/transport/tests/unit/testactors.js
+++ b/devtools/shared/transport/tests/unit/testactors.js
@@ -1,5 +1,6 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 const { ActorPool, appendExtraActors, createExtraActors } =
   require("devtools/server/actors/common");
@@ -9,8 +10,8 @@ const { DebuggerServer } = require("devtools/server/main");
 const promise = require("promise");
 
 var gTestGlobals = [];
-DebuggerServer.addTestGlobal = function (aGlobal) {
-  gTestGlobals.push(aGlobal);
+DebuggerServer.addTestGlobal = function (global) {
+  gTestGlobals.push(global);
 };
 
 // A mock tab list, for use by tests. This simply presents each global in
@@ -20,18 +21,18 @@ DebuggerServer.addTestGlobal = function (aGlobal) {
 // As implemented now, we consult gTestGlobals when we're constructed, not
 // when we're iterated over, so tests have to add their globals before the
 // root actor is created.
-function TestTabList(aConnection) {
-  this.conn = aConnection;
+function TestTabList(connection) {
+  this.conn = connection;
 
   // An array of actors for each global added with
   // DebuggerServer.addTestGlobal.
   this._tabActors = [];
 
   // A pool mapping those actors' names to the actors.
-  this._tabActorPool = new ActorPool(aConnection);
+  this._tabActorPool = new ActorPool(connection);
 
   for (let global of gTestGlobals) {
-    let actor = new TestTabActor(aConnection, global);
+    let actor = new TestTabActor(connection, global);
     actor.selected = false;
     this._tabActors.push(actor);
     this._tabActorPool.addActor(actor);
@@ -40,7 +41,7 @@ function TestTabList(aConnection) {
     this._tabActors[0].selected = true;
   }
 
-  aConnection.addActorPool(this._tabActorPool);
+  connection.addActorPool(this._tabActorPool);
 }
 
 TestTabList.prototype = {
@@ -50,18 +51,18 @@ TestTabList.prototype = {
   }
 };
 
-function createRootActor(aConnection) {
-  let root = new RootActor(aConnection, {
-    tabList: new TestTabList(aConnection),
+function createRootActor(connection) {
+  let root = new RootActor(connection, {
+    tabList: new TestTabList(connection),
     globalActorFactories: DebuggerServer.globalActorFactories
   });
   root.applicationType = "xpcshell-tests";
   return root;
 }
 
-function TestTabActor(aConnection, aGlobal) {
-  this.conn = aConnection;
-  this._global = aGlobal;
+function TestTabActor(connection, global) {
+  this.conn = connection;
+  this._global = global;
   this._threadActor = new ThreadActor(this, this._global);
   this.conn.addActor(this._threadActor);
   this._attached = false;
@@ -96,7 +97,7 @@ TestTabActor.prototype = {
     return response;
   },
 
-  onAttach: function (aRequest) {
+  onAttach: function (request) {
     this._attached = true;
 
     let response = { type: "tabAttached", threadActor: this._threadActor.actorID };
@@ -105,9 +106,9 @@ TestTabActor.prototype = {
     return response;
   },
 
-  onDetach: function (aRequest) {
+  onDetach: function (request) {
     if (!this._attached) {
-      return { "error":"wrongState" };
+      return { "error": "wrongState" };
     }
     return { type: "detached" };
   },