diff --git a/lib/linguist.rb b/lib/linguist.rb
index 544bb250..c6733a67 100644
--- a/lib/linguist.rb
+++ b/lib/linguist.rb
@@ -59,8 +59,9 @@ class << Linguist
   # Strategies are called in turn until a single Language is returned.
   STRATEGIES = [
     Linguist::Strategy::Modeline,
-    Linguist::Shebang,
     Linguist::Strategy::Filename,
+    Linguist::Shebang,
+    Linguist::Strategy::Extension,
     Linguist::Heuristics,
     Linguist::Classifier
   ]
diff --git a/lib/linguist/language.rb b/lib/linguist/language.rb
index 3e698b01..6874a511 100644
--- a/lib/linguist/language.rb
+++ b/lib/linguist/language.rb
@@ -11,6 +11,7 @@ require 'linguist/samples'
 require 'linguist/file_blob'
 require 'linguist/blob_helper'
 require 'linguist/strategy/filename'
+require 'linguist/strategy/extension'
 require 'linguist/strategy/modeline'
 require 'linguist/shebang'
 
@@ -129,41 +130,46 @@ module Linguist
 
     # Public: Look up Languages by filename.
     #
+    # The behaviour of this method recently changed.
+    # See the second example below.
+    #
     # filename - The path String.
     #
     # Examples
     #
+    #   Language.find_by_filename('Cakefile')
+    #   # => [#<Language name="CoffeeScript">]
     #   Language.find_by_filename('foo.rb')
-    #   # => [#<Language name="Ruby">]
+    #   # => []
     #
     # Returns all matching Languages or [] if none were found.
     def self.find_by_filename(filename)
       basename = File.basename(filename)
-
-      # find the first extension with language definitions
-      extname = FileBlob.new(filename).extensions.detect do |e|
-        !@extension_index[e].empty?
-      end
-
-      (@filename_index[basename] + @extension_index[extname]).compact.uniq
+      @filename_index[basename]
     end
 
     # Public: Look up Languages by file extension.
     #
-    # extname - The extension String.
+    # The behaviour of this method recently changed.
+    # See the second example below.
+    #
+    # filename - The path String.
     #
     # Examples
     #
-    #   Language.find_by_extension('.rb')
+    #   Language.find_by_extension('dummy.rb')
     #   # => [#<Language name="Ruby">]
-    #
     #   Language.find_by_extension('rb')
-    #   # => [#<Language name="Ruby">]
+    #   # => []
     #
     # Returns all matching Languages or [] if none were found.
-    def self.find_by_extension(extname)
-      extname = ".#{extname}" unless extname.start_with?(".")
-      @extension_index[extname.downcase]
+    def self.find_by_extension(filename)
+      # find the first extension with language definitions
+      extname = FileBlob.new(filename.downcase).extensions.detect do |e|
+        !@extension_index[e].empty?
+      end
+
+      @extension_index[extname]
     end
 
     # Public: Look up Languages by interpreter.
diff --git a/lib/linguist/strategy/extension.rb b/lib/linguist/strategy/extension.rb
new file mode 100644
index 00000000..161dc34c
--- /dev/null
+++ b/lib/linguist/strategy/extension.rb
@@ -0,0 +1,10 @@
+module Linguist
+  module Strategy
+    # Detects language based on extension
+    class Extension
+      def self.call(blob, _)
+        Language.find_by_extension(blob.name.to_s)
+      end
+    end
+  end
+end
diff --git a/lib/linguist/strategy/filename.rb b/lib/linguist/strategy/filename.rb
index b8c819eb..f3656515 100644
--- a/lib/linguist/strategy/filename.rb
+++ b/lib/linguist/strategy/filename.rb
@@ -1,9 +1,10 @@
 module Linguist
   module Strategy
-    # Detects language based on filename and/or extension
+    # Detects language based on filename
     class Filename
       def self.call(blob, _)
-        Language.find_by_filename(blob.name.to_s)
+        name = blob.name.to_s
+        Language.find_by_filename(name)
       end
     end
   end
diff --git a/test/fixtures/CMake/CMakeLists.txt b/test/fixtures/CMake/CMakeLists.txt
new file mode 100644
index 00000000..41effdc3
--- /dev/null
+++ b/test/fixtures/CMake/CMakeLists.txt
@@ -0,0 +1,29 @@
+cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
+
+project("To do list")
+
+enable_testing()
+
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
+    "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    set(warnings "-Wall -Wextra -Werror")
+elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+    set(warnings "/W4 /WX /EHsc")	
+endif()
+
+set(optimize "-O2")
+
+if (NOT CONFIGURED_ONCE)
+    set(CMAKE_CXX_FLAGS "${warnings} ${optimize}"
+        CACHE STRING "Flags used by the compiler during all build types." FORCE)
+    set(CMAKE_C_FLAGS   "${warnings} ${optimize}"
+        CACHE STRING "Flags used by the compiler during all build types." FORCE)
+endif()
+
+
+add_executable(toDo main.cpp ToDo.cpp)
+
+add_test(toDoTest toDo)
+
+set(CONFIGURED_ONCE TRUE CACHE INTERNAL
+    "A flag showing that CMake has configured at least once.")
\ No newline at end of file
diff --git a/test/fixtures/CoffeeScript/Cakefile b/test/fixtures/CoffeeScript/Cakefile
new file mode 100755
index 00000000..05dddf54
--- /dev/null
+++ b/test/fixtures/CoffeeScript/Cakefile
@@ -0,0 +1,200 @@
+http = require 'http'
+https = require 'https'
+fs = require 'fs'
+path = require 'path'
+{spawn, exec} = require 'child_process'
+semver = require 'semver'
+AdmZip = require('adm-zip')
+GitHubApi = require 'github'
+
+github = new GitHubApi(version: '3.0.0')
+
+# ----------------
+# Server / Builder
+# ----------------
+
+option '-P', '--production', 'run server in production mode'
+option null, '--port [PORT]', 'listen on specified port (default 3333)'
+
+LOCAL_BRUNCH = path.join('.', 'node_modules', '.bin', 'brunch')
+
+spawnBrunch = (flags, env) ->
+  if fs.existsSync(LOCAL_BRUNCH)
+    brunch = spawn LOCAL_BRUNCH, flags, env
+  else
+    console.error 'Warning, using global brunch. Run `npm install`.'
+    brunch = spawn 'brunch', flags, env
+
+  brunch.stdout.on 'data', (data) -> console.log data.toString().trim()
+  brunch.stderr.on 'data', (data) -> console.log data.toString().trim()
+
+runBrunchWatch = (options, shouldStartServer) ->
+  flags = ['w']
+  flags.push '-s' if shouldStartServer
+
+  if options.production?
+    flags.push('-P')
+    process.env.BRUNCH_ENV = 'production'
+
+  if options.port?
+    flags.push '-p'
+    flags.push options.port
+
+  spawnBrunch flags, process.env
+
+task 'server', 'start the brunch server in development', (options) ->
+  runBrunchWatch(options, true)
+
+task 'watch', 'build the app continuously without a server', (options) ->
+  runBrunchWatch(options, false)
+
+task 'build', 'build for production', ->
+  process.env.BRUNCH_ENV = 'production'
+  spawnBrunch ['b', '-P'], process.env
+
+task 'test', 'run brunch in the test environment', ->
+  flags = ['w', '-s']
+  process.env.BRUNCH_ENV = 'test'
+  spawnBrunch flags, process.env
+
+# -------------
+# Tapas Updates
+# -------------
+updateMessage = 'update Tapas to latest (Cakefile, package.json, portkey.json,
+ config.coffee, generators/*)'
+task 'tapas:update', updateMessage, (options) ->
+  url = 'https://codeload.github.com/mutewinter/tapas-with-ember/zip/master'
+  filesToUpdate = [
+    'Cakefile'
+    'package.json'
+    'portkey.json'
+    'config.coffee'
+    'generators/'
+    'testem.json'
+    'bower.json'
+  ]
+  https.get url, (res) ->
+    data = []
+    dataLen = 0
+
+    res.on('data', (chunk) ->
+      data.push(chunk)
+      dataLen += chunk.length
+    ).on('end', ->
+      buf = new Buffer(dataLen)
+
+      pos = 0
+      for dataItem in data
+        dataItem.copy(buf, pos)
+        pos += dataItem.length
+
+      zip = new AdmZip(buf)
+
+      filesToUpdate.forEach (file) ->
+        targetFile = "tapas-with-ember-master/#{file}"
+        if /\/$/.test(file)
+          zip.extractEntryTo(targetFile, file, false, true)
+        else
+          zip.extractEntryTo(targetFile, '', false, true)
+    )
+
+# --------------
+# Script Updates
+# --------------
+
+EMBER_BASE_URL = 'http://builds.emberjs.com'
+GITHUB_API_URL = 'https://api.github.com'
+EMBER = {}
+EMBER_DATA = {}
+['release', 'beta', 'canary'].forEach (build) ->
+  EMBER[build] =
+    prod: "#{EMBER_BASE_URL}/#{build}/ember.prod.js"
+    dev: "#{EMBER_BASE_URL}/#{build}/ember.js"
+  EMBER_DATA[build] =
+    prod: "#{EMBER_BASE_URL}/#{build}/ember-data.prod.js"
+    dev: "#{EMBER_BASE_URL}/#{build}/ember-data.js"
+
+EMBER['tag'] =
+  prod: "#{EMBER_BASE_URL}/tags/{{tag}}/ember.prod.js"
+  dev: "#{EMBER_BASE_URL}/tags/{{tag}}/ember.js"
+
+EMBER_DATA['tag'] =
+  prod: "#{EMBER_BASE_URL}/tags/{{tag}}/ember-data.prod.js"
+  dev: "#{EMBER_BASE_URL}/tags/{{tag}}/ember-data.js"
+
+downloadFile = (src, dest) ->
+  console.log('Downloading ' + src + ' to ' + dest)
+  data = ''
+  request = http.get src, (response) ->
+    response.on('data', (chunk) ->
+      data += chunk
+    )
+    response.on('end', ->
+      fs.writeFileSync(dest, data)
+    )
+
+downloadEmberFile = (src, dest) ->
+  downloadFile(src, "vendor/ember/#{dest}")
+
+listTags = (user, repo, since, name, command) ->
+  github.repos.getTags(user: user, repo: repo, (resp, tags) ->
+    for tag in tags
+      if semver.valid(tag.name) and !semver.lt(tag.name, since)
+        firstTag = tag.name unless firstTag
+        console.log "  #{tag.name}"
+    console.log "Install with cake -t \"#{firstTag}\" #{command}"
+  )
+
+installEmberFiles = (project, filename, options) ->
+  if 'tag' of options
+    # Download a Tag
+    tag = options.tag
+    tag = "v#{tag}" unless /^v/.test(tag)
+    downloadEmberFile(project['tag'].dev.replace(/{{tag}}/, tag),
+      "development/#{filename}")
+    downloadEmberFile(project['tag'].prod.replace(/{{tag}}/, tag),
+      "production/#{filename}")
+  else
+    # Download a Channel
+    channel = options.channel ? 'release'
+    downloadEmberFile project[channel].dev, "development/#{filename}"
+    downloadEmberFile project[channel].prod, "production/#{filename}"
+
+# Channel
+option '-c', '--channel "[CHANNEL_NAME]"',
+  'relase, beta, or canary (http://emberjs.com/builds)'
+
+# Tag
+option '-t', '--tag "[TAG_NAME]"',
+  'a tagged release to install. Run cake ember:list to see known tags'
+
+# -----
+# Ember
+# -----
+task 'ember:install', 'install latest Ember', (options) ->
+  installEmberFiles(EMBER, 'ember.js', options)
+
+task 'ember:list', 'list tagged relases of Ember since v1.0.0', (options) ->
+  listTags 'emberjs', 'ember.js', 'v1.0.0', 'Ember', 'ember:install'
+
+# ----------
+# Ember Data
+# ----------
+task 'ember-data:install', 'install latest Ember Data', (options) ->
+  options.channel or= 'beta'
+  installEmberFiles(EMBER_DATA, 'ember-data.js', options)
+
+task 'ember-data:list', 'list tagged relases of Ember Data', (options) ->
+  listTags 'emberjs', 'data', 'v0.0.1', 'Ember Data',
+    'ember-data:install'
+
+# -----------
+# Ember Model
+# -----------
+EMBER_MODEL =
+  dev: 'http://builds.erikbryn.com/ember-model/ember-model-latest.js'
+  prod: 'http://builds.erikbryn.com/ember-model/ember-model-latest.prod.js'
+
+task 'ember-model:install', 'install latest Ember Model', (options) ->
+  downloadEmberFile EMBER_MODEL.dev, 'development/ember-model.js'
+  downloadEmberFile EMBER_MODEL.prod, 'production/ember-model.js'
diff --git a/test/fixtures/Dockerfile/Dockerfile b/test/fixtures/Dockerfile/Dockerfile
new file mode 100755
index 00000000..c61ae8d0
--- /dev/null
+++ b/test/fixtures/Dockerfile/Dockerfile
@@ -0,0 +1,97 @@
+FROM ubuntu:14.04
+
+MAINTAINER Wesley Hales <wesleyhales@gmail.com>
+
+# Install.
+RUN \
+  sed -i 's/# \(.*multiverse$\)/\1/g' /etc/apt/sources.list && \
+  apt-get update && \
+  apt-get -y upgrade && \
+  apt-get install -y build-essential && \
+  apt-get install -y software-properties-common && \
+  apt-get install -y byobu curl git htop man unzip vim wget && \
+  rm -rf /var/lib/apt/lists/*
+
+# Set environment variables.
+ENV HOME /root
+
+# Define working directory.
+WORKDIR /root
+
+# Install Java.
+RUN \
+  echo oracle-java7-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections && \
+  add-apt-repository -y ppa:webupd8team/java && \
+  apt-get update && \
+  apt-get install -y oracle-java7-installer && \
+  rm -rf /var/lib/apt/lists/* \
+  echo "done"
+
+# Install Phantom2 build requirements    (Won't build on systems < 2GB ram)
+RUN \
+  sudo apt-get update && apt-get -y install g++ flex bison gperf ruby perl \
+  libsqlite3-dev libfontconfig1-dev libicu-dev libfreetype6 libssl-dev libjpeg-dev libqt5webkit5-dev
+
+#####################################build latest phantom
+######################################+++++ only do this in dev when needed
+
+#RUN rm -rf phantomjs
+
+#RUN git clone git://github.com/ariya/phantomjs.git
+
+#RUN cd /root/phantomjs/ && ./build.sh --confirm
+
+#RUN ln -s /root/phantomjs/bin/phantomjs /usr/bin/phantomjs
+######################################+++++ END only do this in dev when needed
+
+######################################+++++ comment out when building new version of phantomjs
+ADD phantomjs /root/phantomjs
+
+RUN ln -s /root/phantomjs /usr/bin/phantomjs
+######################################+++++ END comment out when building new version of phantomjs
+
+RUN git clone git://github.com/wesleyhales/speedgun.git
+
+#RUN mkdir /root/speedgun/core/reports
+
+#VOLUME ["/root/speedgun/core/reports"]
+
+RUN cd speedgun/core && phantomjs --ssl-protocol=any --ignore-ssl-errors=yes speedgun.js http://www.google.com performance csv
+
+RUN cd /root && wget https://dl.dropboxusercontent.com/u/12278845/server.tar
+
+RUN cd /root && tar -xvf server.tar
+
+#RUN echo "cd /root/jboss-as-7.1.1.Final-fluxui/ && ./bin/standalone.sh --server-config=standalone-full.xml -b 0.0.0.0" >> /root/.bashrc
+
+# install maven
+RUN sudo apt-get update && apt-get install -y maven
+
+ADD src /root/src
+ADD pom.xml /root/pom.xml
+RUN mvn clean install
+
+#RUN cp -rf /root/target/speedgun.war /root/jboss-as-7.1.1.Final-fluxui/standalone/deployments/
+
+RUN ln -s /root/target/speedgun /root/jboss-as-7.1.1.Final-fluxui/standalone/deployments/speedgun.war
+
+RUN touch /root/jboss-as-7.1.1.Final-fluxui/standalone/deployments/speedgun.war.dodeploy
+
+# Cleanup old JMS queue
+RUN rm -rf /root/jboss-as-7.1.1.Final-fluxui/standalone/tmp/ /root/jboss-as-7.1.1.Final-fluxui/standalone/data/*
+
+RUN mkdir /root/jboss-as-7.1.1.Final-fluxui/speedgun
+RUN cd /root/jboss-as-7.1.1.Final-fluxui/speedgun && curl -O https://raw.githubusercontent.com/wesleyhales/speedgun/master/core/speedgun.js
+RUN cd /root/jboss-as-7.1.1.Final-fluxui/speedgun && curl -O https://raw.githubusercontent.com/wesleyhales/speedgun/master/core/config.json
+
+COPY server-entrypoint.sh /
+
+ENTRYPOINT ["/server-entrypoint.sh"]
+
+RUN apt-get install -y postgresql-client
+
+COPY speedgun.sql /
+
+EXPOSE 3306 8080 8443
+
+#CMD ["postgres"]
\ No newline at end of file
diff --git a/test/fixtures/Makefile/Makefile b/test/fixtures/Makefile/Makefile
new file mode 100755
index 00000000..b79c161d
--- /dev/null
+++ b/test/fixtures/Makefile/Makefile
@@ -0,0 +1,5 @@
+SUBDIRS:=components test
+.PHONY: ${SUBDIRS} clean
+all:${SUBDIRS}
+${SUBDIRS}:
+	${MAKE} -C $@ all
diff --git a/test/fixtures/Maven POM/pom.xml b/test/fixtures/Maven POM/pom.xml
new file mode 100644
index 00000000..36e06664
--- /dev/null
+++ b/test/fixtures/Maven POM/pom.xml	
@@ -0,0 +1,57 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+<groupId>awilbur.personal</groupId>
+ <artifactId>hudsel</artifactId>
+ <version>1.0-SNAPSHOT</version>
+ <packaging>jar</packaging>
+<name>hudsel</name>
+<properties>
+ <suiteXmlFile>src/test/resources/testng.xml</suiteXmlFile>
+ <skipTests>false</skipTests>
+ </properties>
+<dependencies>
+ <!-- Adding TestNG for unit test support -->
+ <dependency>
+ <groupId>org.testng</groupId>
+ <artifactId>testng</artifactId>
+ <version>6.8</version>
+ </dependency>
+ <!-- Adding Selenium dependency -->
+ <dependency>
+ <groupId>org.seleniumhq.selenium</groupId>
+ <artifactId>selenium-server</artifactId>
+ <version>2.41.0</version>
+ </dependency>
+ </dependencies>
+ <build>
+ <plugins>
+ <!-- using the compiler plug-in to specify that this project is to be compiled with JDK 1.6 -->
+ <!-- This is needed so that we get the JDK annotation support that was introduced recently -->
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-compiler-plugin</artifactId>
+ <configuration>
+ <source>1.6</source>
+ <target>1.6</target>
+ </configuration>
+ </plugin>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-surefire-plugin</artifactId>
+ <version>2.6</version>
+ <configuration>
+ <!-- You can specify a specific testng.xml file here <suiteXmlFiles>
+ <suiteXmlFile>src/test/resources/testng-sample.xml</suiteXmlFile> </suiteXmlFiles> -->
+ <!-- Or dynamically with something like '-DsuiteXmlFile=src/test/resources/testng-sample.xml' -->
+ <suiteXmlFiles>
+ <suiteXmlFile>${suiteXmlFile}</suiteXmlFile>
+ </suiteXmlFiles>
+ <!-- Build with '-DskipTests=true' to bypass test execution @ build time Default: false -->
+ <skipTests>${skipTests}</skipTests>
+ <testFailureIgnore>true</testFailureIgnore>
+ </configuration>
+ </plugin>
+ </plugins>
+ </build>
+ </project>
diff --git a/test/test_language.rb b/test/test_language.rb
index 6adca263..8e7253ea 100644
--- a/test/test_language.rb
+++ b/test/test_language.rb
@@ -170,10 +170,16 @@ class TestLanguage < Minitest::Test
 
   def test_find_by_extension
     assert_equal [], Language.find_by_extension('.factor-rc')
-    assert_equal [], Language.find_by_extension('foo.rb')
-    assert_equal [Language['Ruby']], Language.find_by_extension('rb')
-    assert_equal [Language['Ruby']], Language.find_by_extension('.rb')
-    assert_equal [Language['Limbo'], Language['M'], Language['MUF'], Language['Mathematica'], Language['Matlab'], Language['Mercury'], Language['Objective-C']], Language.find_by_extension('.m')
+    assert_equal [Language['Limbo'], Language['M'], Language['MUF'], Language['Mathematica'], Language['Matlab'], Language['Mercury'], Language['Objective-C']], Language.find_by_extension('foo.m')
+    assert_equal [Language['Ruby']], Language.find_by_extension('foo.rb')
+    assert_equal [Language['Ruby']], Language.find_by_extension('foo/bar.rb')
+    assert_equal [Language['Ruby']], Language.find_by_extension('PKGBUILD.rb')
+    assert_equal ['C', 'C++', 'Objective-C'], Language.find_by_extension('foo.h').map(&:name).sort
+    assert_equal [], Language.find_by_extension('rb')
+    assert_equal [], Language.find_by_extension('.null')
+    assert_equal [Language['HTML+Django']], Language.find_by_extension('index.jinja')
+    assert_equal [Language['Chapel']], Language.find_by_extension('examples/hello.chpl')
+    assert_equal [], Language.find_by_filename('F.I.L.E.')
   end
 
   def test_find_all_by_extension
@@ -186,23 +192,17 @@ class TestLanguage < Minitest::Test
 
   def test_find_by_filename
     assert_equal [Language['Shell']], Language.find_by_filename('PKGBUILD')
-    assert_equal [Language['Ruby']], Language.find_by_filename('foo.rb')
-    assert_equal [Language['Ruby']], Language.find_by_filename('foo/bar.rb')
     assert_equal [Language['Ruby']], Language.find_by_filename('Rakefile')
-    assert_equal [Language['Ruby']], Language.find_by_filename('PKGBUILD.rb')
     assert_equal Language['ApacheConf'], Language.find_by_filename('httpd.conf').first
     assert_equal [Language['ApacheConf']], Language.find_by_filename('.htaccess')
     assert_equal Language['Nginx'], Language.find_by_filename('nginx.conf').first
-    assert_equal ['C', 'C++', 'Objective-C'], Language.find_by_filename('foo.h').map(&:name).sort
+    assert_equal [], Language.find_by_filename('foo.rb')
     assert_equal [], Language.find_by_filename('rb')
     assert_equal [], Language.find_by_filename('.null')
     assert_equal [Language['Shell']], Language.find_by_filename('.bashrc')
     assert_equal [Language['Shell']], Language.find_by_filename('bash_profile')
     assert_equal [Language['Shell']], Language.find_by_filename('.zshrc')
     assert_equal [Language['Clojure']], Language.find_by_filename('riemann.config')
-    assert_equal [Language['HTML+Django']], Language.find_by_filename('index.jinja')
-    assert_equal [Language['Chapel']], Language.find_by_filename('examples/hello.chpl')
-    assert_equal [], Language.find_by_filename('F.I.L.E.')
   end
 
   def test_find_by_interpreter