diff --git a/unittests/Optimizer/Builder/CharacterTest.cpp b/unittests/Optimizer/Builder/CharacterTest.cpp
index 52da7a7..64daf94 100644
--- a/unittests/Optimizer/Builder/CharacterTest.cpp
+++ b/unittests/Optimizer/Builder/CharacterTest.cpp
@@ -62,26 +62,6 @@
       fir::factory::CharacterExprHelper::getCharacterKind(ty));
 }
 
-TEST_F(CharacterTest, createConcatenate) {
-  auto builder = getBuilder();
-  auto loc = builder.getUnknownLoc();
-  auto charHelper = fir::factory::CharacterExprHelper(builder, loc);
-  llvm::StringRef lhs("rightsideofconcat");
-  llvm::StringRef rhs("leftsideofconcat");
-  auto strLitLhs = fir::factory::createStringLiteral(builder, loc, lhs);
-  auto strLitRhs = fir::factory::createStringLiteral(builder, loc, rhs);
-  auto concat = charHelper.createConcatenate(
-      *strLitRhs.getCharBox(), *strLitLhs.getCharBox());
-  EXPECT_TRUE(mlir::isa<arith::AddIOp>(concat.getLen().getDefiningOp()));
-  auto addOp = dyn_cast<arith::AddIOp>(concat.getLen().getDefiningOp());
-  EXPECT_TRUE(mlir::isa<ConstantOp>(addOp.lhs().getDefiningOp()));
-  auto lhsCstOp = dyn_cast<ConstantOp>(addOp.lhs().getDefiningOp());
-  EXPECT_TRUE(mlir::isa<ConstantOp>(addOp.rhs().getDefiningOp()));
-  auto rhsCstOp = dyn_cast<ConstantOp>(addOp.rhs().getDefiningOp());
-  checkIntegerConstant(lhsCstOp, builder.getCharacterLengthType(), 16);
-  checkIntegerConstant(rhsCstOp, builder.getCharacterLengthType(), 17);
-}
-
 TEST_F(CharacterTest, createSubstring) {
   auto builder = getBuilder();
   auto loc = builder.getUnknownLoc();