diff --git a/app/AttributeTypes/Units/Implementations/LengthUnits.php b/app/AttributeTypes/Units/Implementations/LengthUnits.php
index c499603d..9ffbcd4c 100644
--- a/app/AttributeTypes/Units/Implementations/LengthUnits.php
+++ b/app/AttributeTypes/Units/Implementations/LengthUnits.php
@@ -29,8 +29,5 @@ public function __construct() {
             Unit::createUnit('yard'      , 'yd', Imperial::YARD_2_M),
             Unit::createUnit('mile'      , 'mi', Imperial::MILE_2_M),
         ]);
-        $this->add(
-            Unit::createUnit('light_year', 'ly', General::LIGHTYEAR),
-        );
     }
 }
diff --git a/tests/Unit/Attributes/SiAttributeTest.php b/tests/Unit/Attributes/SiAttributeTest.php
index 5682264e..15817aa3 100644
--- a/tests/Unit/Attributes/SiAttributeTest.php
+++ b/tests/Unit/Attributes/SiAttributeTest.php
@@ -129,13 +129,6 @@ public function testLengthUnits() {
         $this->assertEquals('mile', $mile->getLabel());
         $this->assertEquals('mi', $mile->getSymbol());
         $this->assertEquals(1609.344, $mile->is(1));
-
-        // Others
-        $lightYear = $lengthUnits->get('light_year');
-        $this->assertNotNull($lightYear);
-        $this->assertEquals('light_year', $lightYear->getLabel());
-        $this->assertEquals('ly', $lightYear->getSymbol());
-        $this->assertEquals(9460730472580800, $lightYear->is(1));
     }