diff --git a/src/Console/Command/GenerateCommand.php b/src/Console/Command/GenerateCommand.php
index 896de6f..40af0e6 100644
--- a/src/Console/Command/GenerateCommand.php
+++ b/src/Console/Command/GenerateCommand.php
@@ -40,7 +40,7 @@ class GenerateCommand extends Command
 
         try {
             // TODO: Inject this.
-            new Builder($this->filters($input), $outputFile = $this->outputFile($input));
+            new Builder($this->filters($input), $outputFile = $this->outputFile($input), true, $input->getOption('expanded'));
 
             $io->success(sprintf('%s file generated.', $outputFile));
         } catch (IOException $e) {
@@ -61,6 +61,6 @@ class GenerateCommand extends Command
             throw new \RuntimeException('No input file found.');
         }
 
-        return require_once $inputFile;
+        return require $inputFile;
     }
 }
diff --git a/src/Service/Builder.php b/src/Service/Builder.php
index 40bc4c2..c96878d 100644
--- a/src/Service/Builder.php
+++ b/src/Service/Builder.php
@@ -29,12 +29,16 @@ class Builder
      */
     private $xml;
 
-    public function __construct(array $filters, $outputFile = 'filters.xml', $writeFile = true)
+    /** @var bool  */
+    private $expanded;
+
+    public function __construct(array $filters, $outputFile = 'filters.xml', $writeFile = true, $expanded = false)
     {
         $this->filesystem = new Filesystem();
         $this->filters = $filters;
         $this->outputFile = $outputFile;
         $this->writeFile = $writeFile;
+        $this->expanded = $expanded;
 
         $this->build();
     }
@@ -61,14 +65,14 @@ class Builder
      */
     private function build(): void
     {
-        $prefix = "<?xml version='1.0' encoding='UTF-8'?>" . PHP_EOL . "<feed xmlns='http://www.w3.org/2005/Atom' xmlns:apps='http://schemas.google.com/apps/2006'>";
+        $prefix = "<?xml version='1.0' encoding='UTF-8'?>" . $this->glue() . "<feed xmlns='http://www.w3.org/2005/Atom' xmlns:apps='http://schemas.google.com/apps/2006'>";
         $suffix = '</feed>';
 
         $xml = collect($this->filters)->map(function ($items) {
             return $this->buildEntry($items);
-        })->implode(PHP_EOL);
+        })->implode($this->glue());
 
-        $this->xml = collect([$prefix, $xml, $suffix])->implode(PHP_EOL);
+        $this->xml = collect([$prefix, $xml, $suffix])->implode($this->glue());
 
         if ($this->writeFile) {
             $this->filesystem->dumpFile($this->outputFile, $this->xml);
@@ -88,9 +92,9 @@ class Builder
             ->map(function ($value, $key): string {
                 return $this->buildProperty($value, $key);
             })
-            ->implode(PHP_EOL);
+            ->implode($this->glue());
 
-        return collect(['<entry>', $entry, '</entry>'])->implode(PHP_EOL);
+        return collect(['<entry>', $entry, '</entry>'])->implode($this->glue());
     }
 
     /**
@@ -128,4 +132,9 @@ class Builder
 
         return sprintf('(%s)', collect($value)->implode($separator));
     }
+
+    private function glue()
+    {
+        return $this->expanded ? PHP_EOL : null;
+    }
 }
diff --git a/tests/Unit/Console/Command/GenerateFiltersTest.php b/tests/Unit/Console/Command/GenerateFiltersTest.php
index fb51675..59bca9f 100644
--- a/tests/Unit/Console/Command/GenerateFiltersTest.php
+++ b/tests/Unit/Console/Command/GenerateFiltersTest.php
@@ -33,6 +33,22 @@ class GenerateFiltersTest extends TestCase
         $this->fs->remove([self::OUTPUT_FILENAME]);
     }
 
+    /** @test */
+    public function it_converts_filters_from_php_to_minified_xml()
+    {
+        $this->commandTester->execute([
+            '--input-file' => self::INPUT_FILENAME,
+            '--output-file' => self::OUTPUT_FILENAME,
+        ]);
+
+        $this->assertTrue($this->fs->exists(self::OUTPUT_FILENAME));
+
+        $expected = file_get_contents(__DIR__ . '/../../../fixtures/simple/output.xml');
+        $result = file_get_contents(self::OUTPUT_FILENAME);
+
+        $this->assertEquals(trim($expected), $result);
+    }
+
     /** @test */
     public function it_converts_filters_from_php_to_expanded_xml()
     {
diff --git a/tests/Unit/Service/BuilderTest.php b/tests/Unit/Service/BuilderTest.php
index 4c40fc2..e8f7695 100644
--- a/tests/Unit/Service/BuilderTest.php
+++ b/tests/Unit/Service/BuilderTest.php
@@ -20,7 +20,7 @@ class BuilderTest extends TestCase
             ->star()
             ->important();
 
-        $result = new Builder([$filterA, $filterB], '', false);
+        $result = new Builder([$filterA, $filterB], '', false, true);
 
         $expected = <<<EOF
 <?xml version='1.0' encoding='UTF-8'?>