diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index 5e2a541d5..d67bceb8c 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -48,6 +48,12 @@ QUIZ_CASE(calculation_store) {
   assert_store_is(&store, result3);
 
   store.deleteAll();
+}
+
+QUIZ_CASE(calculation_display_exact_approximate) {
+  GlobalContext globalContext;
+  CalculationStore store;
+
   store.push("1+3/4", &globalContext);
   store.push("ans+2/3", &globalContext);
   ::Calculation::Calculation * lastCalculation = store.calculationAtIndex(1);
@@ -58,4 +64,18 @@ QUIZ_CASE(calculation_store) {
   lastCalculation = store.calculationAtIndex(2);
   quiz_assert(lastCalculation->shouldOnlyDisplayApproximateOutput(&globalContext) == true);
   quiz_assert(strcmp(lastCalculation->approximateOutputText(),"2.6366666666667") == 0);
+
+  store.deleteAll();
+  store.push("1/2", &globalContext);
+  lastCalculation = store.calculationAtIndex(1);
+  quiz_assert(lastCalculation->exactAndApproximateDisplayedOutputsAreEqual(&globalContext) == ::Calculation::Calculation::EqualSign::Equal);
+  quiz_assert(lastCalculation->shouldOnlyDisplayApproximateOutput(&globalContext) == false);
+
+  store.deleteAll();
+  store.push("1/3", &globalContext);
+  lastCalculation = store.calculationAtIndex(1);
+  quiz_assert(lastCalculation->exactAndApproximateDisplayedOutputsAreEqual(&globalContext) == ::Calculation::Calculation::EqualSign::Approximation);
+  quiz_assert(lastCalculation->shouldOnlyDisplayApproximateOutput(&globalContext) == false);
+
+  store.deleteAll();
 }