diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathExpressionsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathExpressionsSuite.scala
index 1555dd1cf58d..8ed7a82b943b 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathExpressionsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathExpressionsSuite.scala
@@ -219,6 +219,12 @@ class MathExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
     checkConsistencyBetweenInterpretedAndCodegen(Tan, DoubleType)
   }
 
+  test("cot") {
+    def f: (Double) => Double = (x: Double) => 1 / math.tan(x)
+    testUnary(Cot, f)
+    checkConsistencyBetweenInterpretedAndCodegen(Cot, DoubleType)
+  }
+
   test("atan") {
     testUnary(Atan, math.atan)
     checkConsistencyBetweenInterpretedAndCodegen(Atan, DoubleType)