diff --git a/mlir/test/Dialect/Complex/ops.mlir b/mlir/test/Dialect/Complex/ops.mlir
--- a/mlir/test/Dialect/Complex/ops.mlir
+++ b/mlir/test/Dialect/Complex/ops.mlir
@@ -80,5 +80,8 @@
   // CHECK: complex.atan2 %[[C]], %[[C]] : complex<f32>
   %atan2 = complex.atan2 %complex, %complex : complex<f32>
 
+  // CHECK: complex.tan %[[C]] : complex<f32>
+  %tan = complex.tan %complex : complex<f32>
+
   return
 }