diff --git a/lib/CHANGELOG.md b/lib/CHANGELOG.md
index 745eb59..a261d8f 100644
--- a/lib/CHANGELOG.md
+++ b/lib/CHANGELOG.md
@@ -6,8 +6,6 @@
 
 **Merged pull requests:**
 
-- This PR SHOULD NOT appear in change log! [\#6](https://github.com/skywinder/changelog_test/pull/6) ([skywinder](https://github.com/skywinder))
-
 - Add automatically generated change log file. [\#5](https://github.com/skywinder/changelog_test/pull/5) ([skywinder](https://github.com/skywinder))
 
 ## [v0.0.3](https://github.com/skywinder/changelog_test/tree/v0.0.3) (2015-03-04)
diff --git a/lib/github_changelog_generator.rb b/lib/github_changelog_generator.rb
index ea7576c..8a02b9a 100755
--- a/lib/github_changelog_generator.rb
+++ b/lib/github_changelog_generator.rb
@@ -32,7 +32,8 @@ module GitHubChangelogGenerator
       # @all_tags = get_filtered_tags
       @all_tags = @fetcher.get_all_tags
 
-      @issues, @pull_requests = @fetcher.fetch_issues_and_pull_requests
+      # TODO: refactor this double asssign of @issues and @pull_requests and move all logic in one method
+      @issues, @pull_requests = @fetcher.fetch_closed_issues_and_pr
 
       @pull_requests = @options[:pulls] ? get_filtered_pull_requests : []
 
@@ -120,7 +121,7 @@ module GitHubChangelogGenerator
     # And exclude all from :exclude_labels array.
     # @return [Array] filtered PR's
     def get_filtered_pull_requests
-      fetch_merged_at_pull_requests
+      filter_merged_pull_requests
 
       filtered_pull_requests = include_issues_by_labels(@pull_requests)
 
@@ -133,14 +134,15 @@ module GitHubChangelogGenerator
       filtered_pull_requests
     end
 
-    # This method fetch missing required attributes for pull requests
+    # This method filter only merged PR and
+    # fetch missing required attributes for pull requests
     # :merged_at - is a date, when issue PR was merged.
-    # More correct to use this date, not closed date.
-    def fetch_merged_at_pull_requests
+    # More correct to use merged date, rather than closed date.
+    def filter_merged_pull_requests
       if @options[:verbose]
         print "Fetching merged dates...\r"
       end
-      pull_requests = @fetcher.fetch_pull_requests
+      pull_requests = @fetcher.fetch_closed_pull_requests
 
       @pull_requests.each { |pr|
         fetched_pr = pull_requests.find { |fpr|
@@ -150,8 +152,8 @@ module GitHubChangelogGenerator
         pull_requests.delete(fetched_pr)
       }
 
-      if @options[:verbose]
-        puts "Fetching merged dates: Done!"
+      @pull_requests.select! do |pr|
+        !pr[:merged_at].nil?
       end
     end
 
@@ -217,7 +219,7 @@ module GitHubChangelogGenerator
       output_filename = "#{@options[:output]}"
       File.open(output_filename, "w") { |file| file.write(log) }
       puts "Done!"
-      puts "Generated log placed in #{`pwd`.strip!}/#{output_filename}"
+      puts "Generated log placed in #{Dir.pwd}/#{output_filename}"
     end
 
     # The full cycle of generation for whole project
@@ -279,7 +281,7 @@ module GitHubChangelogGenerator
       threads.each(&:join)
 
       if @options[:verbose]
-        puts "Fetching tags dates: #{i} Done!"
+        puts "Fetching tags dates: #{i}"
       end
     end
 
diff --git a/lib/github_changelog_generator/fetcher.rb b/lib/github_changelog_generator/fetcher.rb
index e5d451c..863a422 100644
--- a/lib/github_changelog_generator/fetcher.rb
+++ b/lib/github_changelog_generator/fetcher.rb
@@ -9,8 +9,10 @@ module GitHubChangelogGenerator
   class Fetcher
     PER_PAGE_NUMBER = 30
     CHANGELOG_GITHUB_TOKEN = "CHANGELOG_GITHUB_TOKEN"
-    GH_RATE_LIMIT_EXCEEDED_MSG = "Warning: GitHub API rate limit (5000 per hour) exceeded, change log may be " \
-        "missing some issues. You can limit the number of issues fetched using the `--max-issues NUM` argument."
+    GH_RATE_LIMIT_EXCEEDED_MSG = "Warning: Can't finish operation: GitHub API rate limit exceeded, change log may be " \
+    "missing some issues. You can limit the number of issues fetched using the `--max-issues NUM` argument."
+    NO_TOKEN_PROVIDED = "Warning: No token provided (-t option) and variable $CHANGELOG_GITHUB_TOKEN was not found. " \
+    "This script can make only 50 requests to GitHub API per hour without token!"
 
     def initialize(options = {})
       @options = options
@@ -29,11 +31,7 @@ module GitHubChangelogGenerator
       github_options[:endpoint] = options[:github_endpoint] unless options[:github_endpoint].nil?
       github_options[:site] = options[:github_endpoint] unless options[:github_site].nil?
 
-      begin
-        @github = Github.new github_options
-      rescue
-        @logger.warn GH_RATE_LIMIT_EXCEEDED_MSG.yellow
-      end
+      @github = check_github_response { Github.new github_options }
     end
 
     # Returns GitHub token. First try to use variable, provided by --token option,
@@ -44,8 +42,7 @@ module GitHubChangelogGenerator
       env_var = @options[:token] ? @options[:token] : (ENV.fetch CHANGELOG_GITHUB_TOKEN, nil)
 
       unless env_var
-        @logger.warn "Warning: No token provided (-t option) and variable $CHANGELOG_GITHUB_TOKEN was not found.".yellow
-        @logger.warn "This script can make only 50 requests to GitHub API per hour without token!".yellow
+        @logger.warn NO_TOKEN_PROVIDED.yellow
       end
 
       env_var
@@ -60,35 +57,47 @@ module GitHubChangelogGenerator
 
       tags = []
 
-      begin
-        response = @github.repos.tags @options[:user], @options[:project]
-        page_i = 0
-        count_pages = response.count_pages
-        response.each_page do |page|
-          page_i += PER_PAGE_NUMBER
-          print "Fetching tags... #{page_i}/#{count_pages * PER_PAGE_NUMBER}\r"
-          tags.concat(page)
-        end
-        print "                               \r"
-
-        if tags.count == 0
-          @logger.warn "Warning: Can't find any tags in repo.\
-Make sure, that you push tags to remote repo via 'git push --tags'".yellow
-        elsif @options[:verbose]
-          @logger.info "Found #{tags.count} tags"
-        end
-
-      rescue
-        @logger.warn GH_RATE_LIMIT_EXCEEDED_MSG.yellow
-      end
+      check_github_response { github_fetch_tags(tags) }
 
       tags
     end
 
+    def check_github_response
+      begin
+        value = yield
+      rescue Github::Error::Unauthorized => e
+        @logger.error e.body.red
+        abort "Error: wrong GitHub token"
+      rescue Github::Error::Forbidden => e
+        @logger.warn e.body.red
+        @logger.warn GH_RATE_LIMIT_EXCEEDED_MSG.yellow
+      end
+      value
+    end
+
+    def github_fetch_tags(tags)
+      response = @github.repos.tags @options[:user], @options[:project]
+      page_i = 0
+      count_pages = response.count_pages
+      response.each_page do |page|
+        page_i += PER_PAGE_NUMBER
+        print_in_same_line("Fetching tags... #{page_i}/#{count_pages * PER_PAGE_NUMBER}")
+        tags.concat(page)
+      end
+      print_empty_line
+
+      if tags.count == 0
+        @logger.warn "Warning: Can't find any tags in repo.\
+Make sure, that you push tags to remote repo via 'git push --tags'".yellow
+      else
+        @logger.info "Found #{tags.count} tags"
+      end
+    end
+
     # This method fetch all closed issues and separate them to pull requests and pure issues
     # (pull request is kind of issue in term of GitHub)
-    # @return [Tuple] with issues and pull requests
-    def fetch_issues_and_pull_requests
+    # @return [Tuple] with (issues, pull-requests)
+    def fetch_closed_issues_and_pr
       if @options[:verbose]
         print "Fetching closed issues...\r"
       end
@@ -104,21 +113,18 @@ Make sure, that you push tags to remote repo via 'git push --tags'".yellow
         count_pages = response.count_pages
         response.each_page do |page|
           page_i += PER_PAGE_NUMBER
-          print "Fetching issues... #{page_i}/#{count_pages * PER_PAGE_NUMBER}\r"
+          print_in_same_line("Fetching issues... #{page_i}/#{count_pages * PER_PAGE_NUMBER}")
           issues.concat(page)
           break if @options[:max_issues] && issues.length >= @options[:max_issues]
         end
+        print_empty_line
+        @logger.info "Received issues: #{issues.count}"
+
       rescue
         @logger.warn GH_RATE_LIMIT_EXCEEDED_MSG.yellow
       end
 
-      print "                                                \r"
-
-      if @options[:verbose]
-        @logger.info "Received issues: #{issues.count}"
-      end
-
-      # remove pull request from issues:
+      # separate arrays of issues and pull requests:
       issues.partition do |x|
         x[:pull_request].nil?
       end
@@ -126,25 +132,35 @@ Make sure, that you push tags to remote repo via 'git push --tags'".yellow
 
     # Fetch all pull requests. We need them to detect :merged_at parameter
     # @return [Array] all pull requests
-    def fetch_pull_requests
+    def fetch_closed_pull_requests
       pull_requests = []
       begin
         response = @github.pull_requests.list @options[:user], @options[:project], state: "closed"
         page_i = 0
+        count_pages = response.count_pages
         response.each_page do |page|
           page_i += PER_PAGE_NUMBER
-          count_pages = response.count_pages
-          print "Fetching merged dates... #{page_i}/#{count_pages * PER_PAGE_NUMBER}\r"
+          log_string = "Fetching merged dates... #{page_i}/#{count_pages * PER_PAGE_NUMBER}"
+          print_in_same_line(log_string)
           pull_requests.concat(page)
         end
+        print_empty_line
       rescue
         @logger.warn GH_RATE_LIMIT_EXCEEDED_MSG.yellow
       end
 
-      print "                                                   \r"
+      @logger.info "Fetching merged dates: #{pull_requests.count}"
       pull_requests
     end
 
+    def print_in_same_line(log_string)
+      print log_string + "\r"
+    end
+
+    def print_empty_line
+      print_in_same_line("                                                                       ")
+    end
+
     # Fetch event for all issues and add them to :events
     # @param [Array] issues
     # @return [Void]
@@ -163,7 +179,7 @@ Make sure, that you push tags to remote repo via 'git push --tags'".yellow
               @logger.warn GH_RATE_LIMIT_EXCEEDED_MSG.yellow
             end
             issue[:events] = obj.body
-            print "Fetching events for issues and PR: #{i + 1}/#{issues.count}\r"
+            print_in_same_line("Fetching events for issues and PR: #{i + 1}/#{issues.count}")
             i += 1
           end
         end
@@ -172,11 +188,9 @@ Make sure, that you push tags to remote repo via 'git push --tags'".yellow
       end
 
       # to clear line from prev print
-      print "                                                            \r"
+      print_empty_line
 
-      if @options[:verbose]
-        @logger.info "Fetching events for issues and PR: #{i} Done!"
-      end
+      @logger.info "Fetching events for issues and PR: #{i}"
     end
 
     # Try to find tag date in local hash.
diff --git a/lib/github_changelog_generator/version.rb b/lib/github_changelog_generator/version.rb
index 8ec937b..65eb6cc 100644
--- a/lib/github_changelog_generator/version.rb
+++ b/lib/github_changelog_generator/version.rb
@@ -1,3 +1,3 @@
 module GitHubChangelogGenerator
-  VERSION = "1.4.0"
+  VERSION = "1.4.1"
 end
diff --git a/spec/unit/fetcher_spec.rb b/spec/unit/fetcher_spec.rb
index 709563f..6baf815 100644
--- a/spec/unit/fetcher_spec.rb
+++ b/spec/unit/fetcher_spec.rb
@@ -1,5 +1,16 @@
+VALID_TOKEN = "0123456789abcdef"
+INVALID_TOKEN = "0000000000000000"
+
+DEFAULT_OPTIONS = { user: "skywinder",
+                    project: "changelog_test" }
+
+def options_with_invalid_token
+  options = DEFAULT_OPTIONS
+  options[:token] = INVALID_TOKEN
+  options
+end
+
 describe GitHubChangelogGenerator::Fetcher do
-  VALID_TOKEN = "0123456789abcdef"
   before(:all) do
     @fetcher = GitHubChangelogGenerator::Fetcher.new
   end
@@ -33,4 +44,16 @@ describe GitHubChangelogGenerator::Fetcher do
       it { is_expected.to eq(VALID_TOKEN) }
     end
   end
+
+  describe "#github_fetch_tags" do
+    context "when wrong token provided" do
+      before do
+        options = options_with_invalid_token
+        @fetcher = GitHubChangelogGenerator::Fetcher.new(options)
+      end
+      it "should raise Unauthorized error" do
+        expect { @fetcher.github_fetch_tags [] }.to raise_error Github::Error::Unauthorized
+      end
+    end
+  end
 end