diff --git a/CHANGELOG.md b/CHANGELOG.md
index 64649f7..ef67ad7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Unreleased
 
+* Fix `Bootsnap.unload_cache!`, it simply wouldn't work at all becaue of a merge mistake. See #421.
+
 # 1.13.0
 
 * Stop decorating `Kernel.load`. This used to be very useful in development because the Rails "classic" autoloader
diff --git a/lib/bootsnap.rb b/lib/bootsnap.rb
index d5490f3..fa7d2d0 100644
--- a/lib/bootsnap.rb
+++ b/lib/bootsnap.rb
@@ -76,7 +76,7 @@ def setup(
       )
     end
 
-    def self.unload_cache!
+    def unload_cache!
       LoadPathCache.unload!
     end
 
diff --git a/lib/bootsnap/load_path_cache.rb b/lib/bootsnap/load_path_cache.rb
index 30ced18..0cd977b 100644
--- a/lib/bootsnap/load_path_cache.rb
+++ b/lib/bootsnap/load_path_cache.rb
@@ -50,7 +50,6 @@ def unload!
         @realpath_cache = nil
         @load_path_cache = nil
         ChangeObserver.unregister($LOAD_PATH)
-        ::Kernel.alias_method(:require_relative, :require_relative_without_bootsnap)
       end
 
       def supported?
diff --git a/test/setup_test.rb b/test/setup_test.rb
index a118907..312bd94 100644
--- a/test/setup_test.rb
+++ b/test/setup_test.rb
@@ -94,5 +94,9 @@ def test_default_setup_with_BOOTSNAP_LOG
 
       Bootsnap.default_setup
     end
+
+    def test_unload_cache
+      Bootsnap.unload_cache!
+    end
   end
 end