diff --git a/spec/models/analyze/graph/column/GenderColumn/unknown_spec.rb b/spec/models/analyze/graph/column/GenderColumn/unknown_spec.rb
new file mode 100644
index 00000000..39170471
--- /dev/null
+++ b/spec/models/analyze/graph/column/GenderColumn/unknown_spec.rb
@@ -0,0 +1,76 @@
+require 'rails_helper'
+
+include Analyze::Graph::Column::GenderColumn
+
+RSpec.describe Analyze::Graph::Column::GenderColumn::Unknown, type: :model do
+  let(:school) { create(:school) }
+  let(:academic_year) { create(:academic_year) }
+  let(:measure) { create(:measure) }
+  let(:academic_years) { [academic_year] }
+  let(:position) { 0 }
+  let(:number_of_columns) { 1 }
+  let(:gender) { create(:gender, qualtrics_code: 99) }
+
+  let(:subcategory) { create(:subcategory, subcategory_id: '1A') }
+  let(:measure) { create(:measure, measure_id: '1A-iii', subcategory:) }
+  let(:scale) { create(:student_scale, measure:) }
+  let(:survey_item) { create(:student_survey_item, scale:) }
+  let(:teacher_scale) { create(:teacher_scale, measure:) }
+  let(:teacher_survey_item) { create(:teacher_survey_item, scale:) }
+
+  context 'when no teacher responses exist' do
+    context 'when there are insufficient unknown students' do
+      it 'reports a score of 3 when the average is 3' do
+        expect(Unknown.new(school:, academic_years:, position:, measure:,
+                           number_of_columns:).score(0).average).to eq(nil)
+      end
+      it 'reports insufficient data' do
+        expect(Unknown.new(school:, academic_years:, position:, measure:,
+                           number_of_columns:).sufficient_student_responses?(academic_year:)).to eq(false)
+      end
+    end
+    context 'when there are sufficient unknown students' do
+      before do
+        create_list(:survey_item_response, 10, school:, academic_year:, gender:, survey_item:)
+      end
+      it 'reports a score of 3 when the average is 3' do
+        expect(Unknown.new(school:, academic_years:, position:, measure:, number_of_columns:).score(0).average).to eq(3)
+      end
+
+      it 'reports sufficient data' do
+        expect(Unknown.new(school:, academic_years:, position:, measure:,
+                           number_of_columns:).sufficient_student_responses?(academic_year:)).to eq(true)
+      end
+    end
+  end
+
+  context 'when teacher responses exist' do
+    before do
+      create_list(:survey_item_response, 10, school:, academic_year:, survey_item: teacher_survey_item, likert_score: 5)
+    end
+
+    context 'when there are insufficient unknown students' do
+      it 'reports a score of 3 when the average is 3' do
+        expect(Unknown.new(school:, academic_years:, position:, measure:,
+                           number_of_columns:).score(0).average).to eq(nil)
+      end
+      it 'reports insufficient data' do
+        expect(Unknown.new(school:, academic_years:, position:, measure:,
+                           number_of_columns:).sufficient_student_responses?(academic_year:)).to eq(false)
+      end
+    end
+    context 'when there are sufficient unknown students' do
+      before do
+        create_list(:survey_item_response, 10, school:, academic_year:, gender:, survey_item:)
+      end
+      it 'reports a score of 3 when the average is 3' do
+        expect(Unknown.new(school:, academic_years:, position:, measure:, number_of_columns:).score(0).average).to eq(3)
+      end
+
+      it 'reports sufficient data' do
+        expect(Unknown.new(school:, academic_years:, position:, measure:,
+                           number_of_columns:).sufficient_student_responses?(academic_year:)).to eq(true)
+      end
+    end
+  end
+end