diff --git a/app/services/projects/update_pages_service.rb b/app/services/projects/update_pages_service.rb
index 7e228d1833dc1916c70964da69466dcf54e60d13..de77f6bf585bd4b19e91de66601f9f9ee1cc755d 100644
--- a/app/services/projects/update_pages_service.rb
+++ b/app/services/projects/update_pages_service.rb
@@ -74,25 +74,13 @@ module Projects
     end
 
     def extract_archive!(temp_path)
-      if artifacts.ends_with?('.tar.gz') || artifacts.ends_with?('.tgz')
-        extract_tar_archive!(temp_path)
-      elsif artifacts.ends_with?('.zip')
+      if artifacts.ends_with?('.zip')
         extract_zip_archive!(temp_path)
       else
         raise InvaildStateError, 'unsupported artifacts format'
       end
     end
 
-    def extract_tar_archive!(temp_path)
-      build.artifacts_file.use_file do |artifacts_path|
-        results = Open3.pipeline(%W(gunzip -c #{artifacts_path}),
-                                %W(dd bs=#{BLOCK_SIZE} count=#{blocks}),
-                                %W(tar -x -C #{temp_path} #{SITE_PATH}),
-                                err: '/dev/null')
-        raise FailedToExtractError, 'pages failed to extract' unless results.compact.all?(&:success?)
-      end
-    end
-
     def extract_zip_archive!(temp_path)
       raise InvaildStateError, 'missing artifacts metadata' unless build.artifacts_metadata?
 
diff --git a/spec/services/projects/update_pages_service_spec.rb b/spec/services/projects/update_pages_service_spec.rb
index dd31a677dfea380007cebf64ee35ddbce8cf919b..1b6caeab15d010a160bf53a540269686dc504a81 100644
--- a/spec/services/projects/update_pages_service_spec.rb
+++ b/spec/services/projects/update_pages_service_spec.rb
@@ -21,76 +21,72 @@ describe Projects::UpdatePagesService do
   end
 
   context 'legacy artifacts' do
-    %w(tar.gz zip).each do |format|
-      let(:extension) { format }
+    let(:extension) { 'zip' }
 
-      context "for valid #{format}" do
+    before do
+      build.update_attributes(legacy_artifacts_file: file)
+      build.update_attributes(legacy_artifacts_metadata: metadata)
+    end
+
+    describe 'pages artifacts' do
+      context 'with expiry date' do
         before do
-          build.update_attributes(legacy_artifacts_file: file)
-          build.update_attributes(legacy_artifacts_metadata: metadata)
+          build.artifacts_expire_in = "2 days"
+          build.save!
         end
 
-        describe 'pages artifacts' do
-          context 'with expiry date' do
-            before do
-              build.artifacts_expire_in = "2 days"
-              build.save!
-            end
-
-            it "doesn't delete artifacts" do
-              expect(execute).to eq(:success)
-
-              expect(build.reload.artifacts?).to eq(true)
-            end
-          end
-
-          context 'without expiry date' do
-            it "does delete artifacts" do
-              expect(execute).to eq(:success)
+        it "doesn't delete artifacts" do
+          expect(execute).to eq(:success)
 
-              expect(build.reload.artifacts?).to eq(false)
-            end
-          end
+          expect(build.reload.artifacts?).to eq(true)
         end
+      end
 
-        it 'succeeds' do
-          expect(project.pages_deployed?).to be_falsey
+      context 'without expiry date' do
+        it "does delete artifacts" do
           expect(execute).to eq(:success)
-          expect(project.pages_deployed?).to be_truthy
 
-          # Check that all expected files are extracted
-          %w[index.html zero .hidden/file].each do |filename|
-            expect(File.exist?(File.join(project.public_pages_path, filename))).to be_truthy
-          end
+          expect(build.reload.artifacts?).to eq(false)
         end
+      end
+    end
 
-        it 'limits pages size' do
-          stub_application_setting(max_pages_size: 1)
-          expect(execute).not_to eq(:success)
-        end
+    it 'succeeds' do
+      expect(project.pages_deployed?).to be_falsey
+      expect(execute).to eq(:success)
+      expect(project.pages_deployed?).to be_truthy
 
-        it 'removes pages after destroy' do
-          expect(PagesWorker).to receive(:perform_in)
-          expect(project.pages_deployed?).to be_falsey
-          expect(execute).to eq(:success)
-          expect(project.pages_deployed?).to be_truthy
-          project.destroy
-          expect(project.pages_deployed?).to be_falsey
-        end
+      # Check that all expected files are extracted
+      %w[index.html zero .hidden/file].each do |filename|
+        expect(File.exist?(File.join(project.public_pages_path, filename))).to be_truthy
+      end
+    end
 
-        it 'fails if sha on branch is not latest' do
-          build.update_attributes(ref: 'feature')
+    it 'limits pages size' do
+      stub_application_setting(max_pages_size: 1)
+      expect(execute).not_to eq(:success)
+    end
 
-          expect(execute).not_to eq(:success)
-        end
+    it 'removes pages after destroy' do
+      expect(PagesWorker).to receive(:perform_in)
+      expect(project.pages_deployed?).to be_falsey
+      expect(execute).to eq(:success)
+      expect(project.pages_deployed?).to be_truthy
+      project.destroy
+      expect(project.pages_deployed?).to be_falsey
+    end
 
-        it 'fails for empty file fails' do
-          build.update_attributes(legacy_artifacts_file: empty_file)
+    it 'fails if sha on branch is not latest' do
+      build.update_attributes(ref: 'feature')
 
-          expect { execute }
-            .to raise_error(Projects::UpdatePagesService::FailedToExtractError)
-        end
-      end
+      expect(execute).not_to eq(:success)
+    end
+
+    it 'fails for empty file fails' do
+      build.update_attributes(legacy_artifacts_file: empty_file)
+
+      expect { execute }
+        .to raise_error(Projects::UpdatePagesService::FailedToExtractError)
     end
   end