diff --git a/app/models/command/parser/context.rb b/app/models/command/parser/context.rb
index c4c0721c2..19ddc883d 100644
--- a/app/models/command/parser/context.rb
+++ b/app/models/command/parser/context.rb
@@ -15,7 +15,7 @@ class Command::Parser::Context
   end
 
   def filter
-    user.filters.from_params params.reverse_merge(**FilterScoped::DEFAULT_PARAMS)
+    user.filters.from_params(params.slice(*Filter::Params::PERMITTED_PARAMS).reverse_merge(**FilterScoped::DEFAULT_PARAMS))
   end
 
   private
diff --git a/test/models/command/assign_test.rb b/test/models/command/assign_test.rb
new file mode 100644
index 000000000..c551da602
--- /dev/null
+++ b/test/models/command/assign_test.rb
@@ -0,0 +1,46 @@
+require "test_helper"
+
+class Command::AssignTest < ActionDispatch::IntegrationTest
+  include CommandTestHelper
+
+  setup do
+    Current.session = sessions(:david)
+    @card = cards(:text)
+  end
+
+  test "assigns card on perma" do
+    assert_difference -> { @card.assignees.count }, +2 do
+      execute_command "/assign @kevin @david", context_url: collection_card_url(@card.collection, @card)
+    end
+
+    assert_includes @card.assignees.reload, users(:david)
+    assert_includes @card.assignees, users(:kevin)
+  end
+
+  test "assigns card on cards' index page" do
+    execute_command "/assign @kevin @david", context_url: collection_cards_url(@card.collection)
+
+    cards(:logo, :text, :layout).each do |card|
+      assert_includes card.assignees.reload, users(:david)
+      assert_includes card.assignees, users(:kevin)
+    end
+  end
+
+  test "undo assignment" do
+    Assignment.destroy_all
+    command = parse_command "/assign @kevin @david", context_url: collection_cards_url(@card.collection)
+
+    command.execute
+
+    cards(:logo, :text, :layout).each do |card|
+      assert_includes card.assignees.reload, users(:david)
+      assert_includes card.assignees, users(:kevin)
+    end
+
+    command.reload.undo
+
+    cards(:logo, :text, :layout).each do |card|
+      assert_empty card.reload.assignees.reload
+    end
+  end
+end