diff --git a/README.md b/README.md
index b27b1c9..34a55fd 100644
--- a/README.md
+++ b/README.md
@@ -64,10 +64,10 @@ the commit history.
 
 Believe it or not, there are a few more environment variables you can set! These determine the text used by repository-sync when creating commit messages and pull requests. They are also dependent on the name of the destination repository. All of these values are optional.
 
-For the examples below, we'll assuming repository-sync is committing into a repository called `gjtorikian/this-test`. Because environment variables cannot use the `/` or `-` characters, you must substitute it within the destination repository name as `_`: `gjtorikian_this_test`. The default string is `'Sync changes from upstream repository'`.
+For the examples below, we'll assuming repository-sync is committing into a repository called `gjtorikian/this-test`. Because environment variables cannot use the `/` or `-` characters, you must substitute those characters in the repository name as `_`. The repository name should also be capitalized. Using our example repository, that would mean a prefix of `GJTORIKIAN_THIS_TEST`.
 
-* `#{safe_destination_repo}_COMMIT_MESSAGE`: This determines the commit message to use when committing into your public repository. Example: `gjtorikian_this_test_COMMIT_MESSAGE`.
+* `#{safe_destination_repo}_COMMIT_MESSAGE`: This determines the commit message to use when committing into your public repository. Example: `GJTORIKIAN_THIS_TEST_COMMIT_MESSAGE`.
 
-* `#{safe_destination_repo}_PR_TITLE`: This determines the title of the PR that's opened into either repository. Example: `gjtorikian_this_test_PR_TITLE`. The default string is `'Sync changes from upstream repository'`.
+* `#{safe_destination_repo}_PR_TITLE`: This determines the title of the PR that's opened into either repository. Example: `GJTORIKIAN_THIS_TEST_PR_TITLE`. The default string is `'Sync changes from upstream repository'`.
 
-* `#{safe_destination_repo}_PR_BODY`: This determines the body text of the PR that's opened into either repository. Example: `gjtorikian_this_test_PR_BODY`. The default string is a listing of the added, modified, and removed files in the PR.
+* `#{safe_destination_repo}_PR_BODY`: This determines the body text of the PR that's opened into either repository. Example: `GJTORIKIAN_THIS_TEST_PR_BODY`. The default string is a listing of the added, modified, and removed files in the PR.
diff --git a/lib/cloner.rb b/lib/cloner.rb
index 8b29694..2ce0276 100644
--- a/lib/cloner.rb
+++ b/lib/cloner.rb
@@ -57,11 +57,11 @@ def branch_name
   end
 
   def safe_destination_repo
-    @safe_destination_repo ||= destination_repo.tr('/-', '_')
+    @safe_destination_repo ||= destination_repo.tr('/-', '_').upcase
   end
 
   def commit_message
-    @commit_message ||= ENV["#{safe_destination_repo.upcase}_COMMIT_MESSAGE"] || 'Sync changes from upstream repository'
+    @commit_message ||= ENV["#{safe_destination_repo}_COMMIT_MESSAGE"] || 'Sync changes from upstream repository'
   end
 
   def files
@@ -73,11 +73,15 @@ def clone_url_with_token
   end
 
   def pull_request_title
-    ENV["#{safe_destination_repo.upcase}_PR_TITLE"] || 'Sync changes from upstream repository'
+    if files.count == 1
+      "#{files.first["status"].capitalize} #{files.first["filename"]}"
+    else
+      ENV["#{safe_destination_repo}_PR_TITLE"] || 'Sync changes from upstream repository'
+    end
   end
 
   def pull_request_body
-    return ENV["#{safe_destination_repo.upcase}_PR_BODY"] if ENV["#{safe_destination_repo.upcase}_PR_BODY"]
+    return ENV["#{safe_destination_repo}_PR_BODY"] if ENV["#{safe_destination_repo}_PR_BODY"]
     body = ""
     ["added", "removed", "unchanged"].each do |type|
       filenames = files.select { |f| f['status'] == type }.map { |f| f['filename'] }
diff --git a/spec/cloner_spec.rb b/spec/cloner_spec.rb
index 79425b7..ab1ebf9 100644
--- a/spec/cloner_spec.rb
+++ b/spec/cloner_spec.rb
@@ -35,7 +35,7 @@
   end
 
   it "creates the safe repo name" do
-    expect(cloner.safe_destination_repo).to eql("gjtorikian_destination_repo")
+    expect(cloner.safe_destination_repo).to eql("GJTORIKIAN_DESTINATION_REPO")
   end
 
   it "defaults to the default commit message" do
@@ -61,15 +61,31 @@
   end
 
   it "defaults to the default pull request title" do
+    url = "https://api.github.com/repos/gjtorikian/destination_repo/compare/master...#{cloner.branch_name}"
+    stub_request(:get, url).
+    to_return(:status => 200, :body => fixture("compare_some_files.json"), :headers => { 'Content-Type' => 'application/json' })
+
     expect(cloner.pull_request_title).to eql("Sync changes from upstream repository")
   end
 
   it "respects user supplied pull-request titles" do
+    url = "https://api.github.com/repos/gjtorikian/destination_repo/compare/master...#{cloner.branch_name}"
+    stub_request(:get, url).
+    to_return(:status => 200, :body => fixture("compare_some_files.json"), :headers => { 'Content-Type' => 'application/json' })
+
     with_env "GJTORIKIAN_DESTINATION_REPO_PR_TITLE", "Some title" do
       expect(cloner.pull_request_title).to eql("Some title")
     end
   end
 
+  it "uses descriptive pull request titles when only one files has changed" do
+    url = "https://api.github.com/repos/gjtorikian/destination_repo/compare/master...#{cloner.branch_name}"
+    stub_request(:get, url).
+    to_return(:status => 200, :body => fixture("compare_single_file.json"), :headers => { 'Content-Type' => 'application/json' })
+
+    expect(cloner.pull_request_title).to eql("Added file1.txt")
+  end
+
   it "geneates the pull request body" do
     url = "https://api.github.com/repos/gjtorikian/destination_repo/compare/master...#{cloner.branch_name}"
     stub_request(:get, url).
diff --git a/spec/fixtures/compare_single_file.json b/spec/fixtures/compare_single_file.json
new file mode 100644
index 0000000..9edd5c3
--- /dev/null
+++ b/spec/fixtures/compare_single_file.json
@@ -0,0 +1,234 @@
+{
+  "url": "https://api.github.com/repos/octocat/Hello-World/compare/master...topic",
+  "html_url": "https://github.com/octocat/Hello-World/compare/master...topic",
+  "permalink_url": "https://github.com/octocat/Hello-World/compare/octocat:bbcd538c8e72b8c175046e27cc8f907076331401...octocat:0328041d1152db8ae77652d1618a02e57f745f17",
+  "diff_url": "https://github.com/octocat/Hello-World/compare/master...topic.diff",
+  "patch_url": "https://github.com/octocat/Hello-World/compare/master...topic.patch",
+  "base_commit": {
+    "url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+    "sha": "6dcb09b5b57875f334f61aebed695e2e4193db5e",
+    "html_url": "https://github.com/octocat/Hello-World/commit/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+    "comments_url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e/comments",
+    "commit": {
+      "url": "https://api.github.com/repos/octocat/Hello-World/git/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+      "author": {
+        "name": "Monalisa Octocat",
+        "email": "support@github.com",
+        "date": "2011-04-14T16:00:49Z"
+      },
+      "committer": {
+        "name": "Monalisa Octocat",
+        "email": "support@github.com",
+        "date": "2011-04-14T16:00:49Z"
+      },
+      "message": "Fix all the bugs",
+      "tree": {
+        "url": "https://api.github.com/repos/octocat/Hello-World/tree/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+        "sha": "6dcb09b5b57875f334f61aebed695e2e4193db5e"
+      },
+      "comment_count": 0
+    },
+    "author": {
+      "login": "octocat",
+      "id": 1,
+      "avatar_url": "https://github.com/images/error/octocat_happy.gif",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/octocat",
+      "html_url": "https://github.com/octocat",
+      "followers_url": "https://api.github.com/users/octocat/followers",
+      "following_url": "https://api.github.com/users/octocat/following{/other_user}",
+      "gists_url": "https://api.github.com/users/octocat/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/octocat/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/octocat/subscriptions",
+      "organizations_url": "https://api.github.com/users/octocat/orgs",
+      "repos_url": "https://api.github.com/users/octocat/repos",
+      "events_url": "https://api.github.com/users/octocat/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/octocat/received_events",
+      "type": "User",
+      "site_admin": false
+    },
+    "committer": {
+      "login": "octocat",
+      "id": 1,
+      "avatar_url": "https://github.com/images/error/octocat_happy.gif",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/octocat",
+      "html_url": "https://github.com/octocat",
+      "followers_url": "https://api.github.com/users/octocat/followers",
+      "following_url": "https://api.github.com/users/octocat/following{/other_user}",
+      "gists_url": "https://api.github.com/users/octocat/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/octocat/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/octocat/subscriptions",
+      "organizations_url": "https://api.github.com/users/octocat/orgs",
+      "repos_url": "https://api.github.com/users/octocat/repos",
+      "events_url": "https://api.github.com/users/octocat/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/octocat/received_events",
+      "type": "User",
+      "site_admin": false
+    },
+    "parents": [
+      {
+        "url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+        "sha": "6dcb09b5b57875f334f61aebed695e2e4193db5e"
+      }
+    ]
+  },
+  "merge_base_commit": {
+    "url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+    "sha": "6dcb09b5b57875f334f61aebed695e2e4193db5e",
+    "html_url": "https://github.com/octocat/Hello-World/commit/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+    "comments_url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e/comments",
+    "commit": {
+      "url": "https://api.github.com/repos/octocat/Hello-World/git/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+      "author": {
+        "name": "Monalisa Octocat",
+        "email": "support@github.com",
+        "date": "2011-04-14T16:00:49Z"
+      },
+      "committer": {
+        "name": "Monalisa Octocat",
+        "email": "support@github.com",
+        "date": "2011-04-14T16:00:49Z"
+      },
+      "message": "Fix all the bugs",
+      "tree": {
+        "url": "https://api.github.com/repos/octocat/Hello-World/tree/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+        "sha": "6dcb09b5b57875f334f61aebed695e2e4193db5e"
+      },
+      "comment_count": 0
+    },
+    "author": {
+      "login": "octocat",
+      "id": 1,
+      "avatar_url": "https://github.com/images/error/octocat_happy.gif",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/octocat",
+      "html_url": "https://github.com/octocat",
+      "followers_url": "https://api.github.com/users/octocat/followers",
+      "following_url": "https://api.github.com/users/octocat/following{/other_user}",
+      "gists_url": "https://api.github.com/users/octocat/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/octocat/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/octocat/subscriptions",
+      "organizations_url": "https://api.github.com/users/octocat/orgs",
+      "repos_url": "https://api.github.com/users/octocat/repos",
+      "events_url": "https://api.github.com/users/octocat/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/octocat/received_events",
+      "type": "User",
+      "site_admin": false
+    },
+    "committer": {
+      "login": "octocat",
+      "id": 1,
+      "avatar_url": "https://github.com/images/error/octocat_happy.gif",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/octocat",
+      "html_url": "https://github.com/octocat",
+      "followers_url": "https://api.github.com/users/octocat/followers",
+      "following_url": "https://api.github.com/users/octocat/following{/other_user}",
+      "gists_url": "https://api.github.com/users/octocat/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/octocat/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/octocat/subscriptions",
+      "organizations_url": "https://api.github.com/users/octocat/orgs",
+      "repos_url": "https://api.github.com/users/octocat/repos",
+      "events_url": "https://api.github.com/users/octocat/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/octocat/received_events",
+      "type": "User",
+      "site_admin": false
+    },
+    "parents": [
+      {
+        "url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+        "sha": "6dcb09b5b57875f334f61aebed695e2e4193db5e"
+      }
+    ]
+  },
+  "status": "behind",
+  "ahead_by": 1,
+  "behind_by": 2,
+  "total_commits": 1,
+  "commits": [
+    {
+      "url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+      "sha": "6dcb09b5b57875f334f61aebed695e2e4193db5e",
+      "html_url": "https://github.com/octocat/Hello-World/commit/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+      "comments_url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e/comments",
+      "commit": {
+        "url": "https://api.github.com/repos/octocat/Hello-World/git/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+        "author": {
+          "name": "Monalisa Octocat",
+          "email": "support@github.com",
+          "date": "2011-04-14T16:00:49Z"
+        },
+        "committer": {
+          "name": "Monalisa Octocat",
+          "email": "support@github.com",
+          "date": "2011-04-14T16:00:49Z"
+        },
+        "message": "Fix all the bugs",
+        "tree": {
+          "url": "https://api.github.com/repos/octocat/Hello-World/tree/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+          "sha": "6dcb09b5b57875f334f61aebed695e2e4193db5e"
+        },
+        "comment_count": 0
+      },
+      "author": {
+        "login": "octocat",
+        "id": 1,
+        "avatar_url": "https://github.com/images/error/octocat_happy.gif",
+        "gravatar_id": "",
+        "url": "https://api.github.com/users/octocat",
+        "html_url": "https://github.com/octocat",
+        "followers_url": "https://api.github.com/users/octocat/followers",
+        "following_url": "https://api.github.com/users/octocat/following{/other_user}",
+        "gists_url": "https://api.github.com/users/octocat/gists{/gist_id}",
+        "starred_url": "https://api.github.com/users/octocat/starred{/owner}{/repo}",
+        "subscriptions_url": "https://api.github.com/users/octocat/subscriptions",
+        "organizations_url": "https://api.github.com/users/octocat/orgs",
+        "repos_url": "https://api.github.com/users/octocat/repos",
+        "events_url": "https://api.github.com/users/octocat/events{/privacy}",
+        "received_events_url": "https://api.github.com/users/octocat/received_events",
+        "type": "User",
+        "site_admin": false
+      },
+      "committer": {
+        "login": "octocat",
+        "id": 1,
+        "avatar_url": "https://github.com/images/error/octocat_happy.gif",
+        "gravatar_id": "",
+        "url": "https://api.github.com/users/octocat",
+        "html_url": "https://github.com/octocat",
+        "followers_url": "https://api.github.com/users/octocat/followers",
+        "following_url": "https://api.github.com/users/octocat/following{/other_user}",
+        "gists_url": "https://api.github.com/users/octocat/gists{/gist_id}",
+        "starred_url": "https://api.github.com/users/octocat/starred{/owner}{/repo}",
+        "subscriptions_url": "https://api.github.com/users/octocat/subscriptions",
+        "organizations_url": "https://api.github.com/users/octocat/orgs",
+        "repos_url": "https://api.github.com/users/octocat/repos",
+        "events_url": "https://api.github.com/users/octocat/events{/privacy}",
+        "received_events_url": "https://api.github.com/users/octocat/received_events",
+        "type": "User",
+        "site_admin": false
+      },
+      "parents": [
+        {
+          "url": "https://api.github.com/repos/octocat/Hello-World/commits/6dcb09b5b57875f334f61aebed695e2e4193db5e",
+          "sha": "6dcb09b5b57875f334f61aebed695e2e4193db5e"
+        }
+      ]
+    }
+  ],
+  "files": [
+    {
+      "sha": "bbcd538c8e72b8c175046e27cc8f907076331401",
+      "filename": "file1.txt",
+      "status": "added",
+      "additions": 103,
+      "deletions": 21,
+      "changes": 124,
+      "blob_url": "https://github.com/octocat/Hello-World/blob/6dcb09b5b57875f334f61aebed695e2e4193db5e/file1.txt",
+      "raw_url": "https://github.com/octocat/Hello-World/raw/6dcb09b5b57875f334f61aebed695e2e4193db5e/file1.txt",
+      "contents_url": "https://api.github.com/repos/octocat/Hello-World/contents/file1.txt?ref=6dcb09b5b57875f334f61aebed695e2e4193db5e",
+      "patch": "@@ -132,7 +132,7 @@ module Test @@ -1000,7 +1000,7 @@ module Test"
+    }
+  ]
+}