diff --git a/spec/components/discourse_spec.rb b/spec/components/discourse_spec.rb
index 701cc399500..aa2542e04ba 100644
--- a/spec/components/discourse_spec.rb
+++ b/spec/components/discourse_spec.rb
@@ -104,6 +104,7 @@ describe Discourse do
     after do
       Discourse.plugins.delete plugin1
       Discourse.plugins.delete plugin2
+      DiscoursePluginRegistry.reset!
     end
 
     before do
diff --git a/spec/components/svg_sprite/svg_sprite_spec.rb b/spec/components/svg_sprite/svg_sprite_spec.rb
index 15bccf6b1b1..e3d1ccd3bf6 100644
--- a/spec/components/svg_sprite/svg_sprite_spec.rb
+++ b/spec/components/svg_sprite/svg_sprite_spec.rb
@@ -243,6 +243,7 @@ describe SvgSprite do
 
       after do
         Discourse.plugins.delete plugin1
+        DiscoursePluginRegistry.reset!
       end
 
       it "includes custom icons from plugins" do
diff --git a/spec/lib/content_security_policy_spec.rb b/spec/lib/content_security_policy_spec.rb
index a2d85c538cb..c8fbcb45c75 100644
--- a/spec/lib/content_security_policy_spec.rb
+++ b/spec/lib/content_security_policy_spec.rb
@@ -234,6 +234,7 @@ describe ContentSecurityPolicy do
       expect(parse(policy)['manifest-src']).to_not include('https://manifest-src.com')
 
       Discourse.plugins.delete plugin
+      DiscoursePluginRegistry.reset!
     end
 
     it 'can extend frame_ancestors' do
@@ -251,6 +252,7 @@ describe ContentSecurityPolicy do
       expect(parse(policy)['frame-ancestors']).to_not include('https://frame-ancestors-plugin.ext')
 
       Discourse.plugins.delete plugin
+      DiscoursePluginRegistry.reset!
     end
   end