diff --git a/third_party/blink/renderer/core/css/css_math_expression_node_test.cc b/third_party/blink/renderer/core/css/css_math_expression_node_test.cc
index b46959ea55ee2..2d936569b4378 100644
--- a/third_party/blink/renderer/core/css/css_math_expression_node_test.cc
+++ b/third_party/blink/renderer/core/css/css_math_expression_node_test.cc
@@ -57,6 +57,14 @@ void PrintTo(const CSSLengthArray& length_array, ::std::ostream* os) {
 
 namespace {
 
+TEST(CSSCalculationValue, DummyTest) {
+  CSSLengthArray expectation, actual;
+  EXPECT_EQ(expectation.values, SetLengthArray("0", actual).values);
+
+  expectation.values.at(CSSPrimitiveValue::kUnitTypePixels) = 20;
+  EXPECT_EQ(expectation.values, SetLengthArray("30px", actual).values);
+}
+
 void TestAccumulatePixelsAndPercent(
     const CSSToLengthConversionData& conversion_data,
     CSSMathExpressionNode* expression,