diff --git a/lib/overrides/mongoid/relations/builder.rb b/lib/overrides/mongoid/relations/builder.rb
index ad3ba93..8800c79 100644
--- a/lib/overrides/mongoid/relations/builder.rb
+++ b/lib/overrides/mongoid/relations/builder.rb
@@ -1,3 +1,7 @@
+# ruby-fogbugz requires crack. crack adds the attributes method to strings,
+# thus breaking the relations of Mongoid.
+# Tests reside in a separate fork of mongoid:
+# https://github.com/mhs/mongoid/commit/e5b2b1346c73a2935c606317314b6ded07260429#diff-1
 module Mongoid
   module Relations
     class Builder
diff --git a/spec/controllers/apps_controller_spec.rb b/spec/controllers/apps_controller_spec.rb
index e34608e..b076670 100644
--- a/spec/controllers/apps_controller_spec.rb
+++ b/spec/controllers/apps_controller_spec.rb
@@ -74,6 +74,71 @@ describe AppsController do
           assigns(:errs).size.should == 10
         end
       end
+
+      context 'with resolved errors' do
+        before(:each) do
+          resolved_err = Factory.create(:err, app: @app, resolved: true)
+          Factory.create(:notice, err: resolved_err)
+        end
+
+        context 'and no params' do
+          it 'shows only unresolved errs' do
+            get :show, id: @app.id
+            assigns(:errs).size.should == 1
+          end
+        end
+
+        context 'and all_errs=true params' do
+          it 'shows all errors' do
+            get :show, id: @app.id, all_errs: true
+            assigns(:errs).size.should == 2
+          end
+        end
+      end
+
+      context 'with environment filters' do
+        before(:each) do
+          environments = ['production', 'test', 'development', 'staging']
+          20.times do |i|
+            Factory.create(:err, app: @app, environment: environments[i % environments.length])
+          end
+        end
+
+        context 'no params' do
+          it 'shows errs for all environments' do
+            get :show, id: @app.id
+            assigns(:errs).size.should == 21
+          end
+        end
+
+        context 'environment production' do
+          it 'shows errs for just production' do
+            get :show, id: @app.id, environment: :production
+            assigns(:errs).size.should == 6
+          end
+        end
+
+        context 'environment staging' do
+          it 'shows errs for just staging' do
+            get :show, id: @app.id, environment: :staging
+            assigns(:errs).size.should == 5
+          end
+        end
+
+        context 'environment development' do
+          it 'shows errs for just development' do
+            get :show, id: @app.id, environment: :development
+            assigns(:errs).size.should == 5
+          end
+        end
+
+        context 'environment test' do
+          it 'shows errs for just test' do
+            get :show, id: @app.id, environment: :test
+            assigns(:errs).size.should == 5
+          end
+        end
+      end
     end
 
     context 'logged in as a user' do
diff --git a/spec/controllers/errs_controller_spec.rb b/spec/controllers/errs_controller_spec.rb
index f2ca886..545c5ff 100644
--- a/spec/controllers/errs_controller_spec.rb
+++ b/spec/controllers/errs_controller_spec.rb
@@ -54,6 +54,50 @@ describe ErrsController do
           assigns(:errs).size.should == 10
         end
       end
+
+      context 'with environment filters' do
+        before(:each) do
+          environments = ['production', 'test', 'development', 'staging']
+          20.times do |i|
+            Factory.create(:err, environment: environments[i % environments.length])
+          end
+        end
+
+        context 'no params' do
+          it 'shows errs for all environments' do
+            get :index
+            assigns(:errs).size.should == 21
+          end
+        end
+
+        context 'environment production' do
+          it 'shows errs for just production' do
+            get :index, environment: :production
+            assigns(:errs).size.should == 6
+          end
+        end
+
+        context 'environment staging' do
+          it 'shows errs for just staging' do
+            get :index, environment: :staging
+            assigns(:errs).size.should == 5
+          end
+        end
+
+        context 'environment development' do
+          it 'shows errs for just development' do
+            get :index, environment: :development
+            assigns(:errs).size.should == 5
+          end
+        end
+
+        context 'environment test' do
+          it 'shows errs for just test' do
+            get :index, environment: :test
+            assigns(:errs).size.should == 5
+          end
+        end
+      end
     end
 
     context 'when logged in as a user' do
--
libgit2 0.21.2