diff --git a/mlir/lib/IR/AsmPrinter.cpp b/mlir/lib/IR/AsmPrinter.cpp
--- a/mlir/lib/IR/AsmPrinter.cpp
+++ b/mlir/lib/IR/AsmPrinter.cpp
@@ -1607,7 +1607,7 @@
 // accept the string "elided". The first string must be a registered dialect
 // name and the latter must be a hex constant.
 static void printElidedElementsAttr(raw_ostream &os) {
-  os << R"(opaque<"_", "0xDEADBEEF">)";
+  os << R"(opaque<"elided_large_const", "0xDEADBEEF">)";
 }
 
 LogicalResult AsmPrinter::Impl::printAlias(Attribute attr) {
diff --git a/mlir/test/CAPI/ir.c b/mlir/test/CAPI/ir.c
--- a/mlir/test/CAPI/ir.c
+++ b/mlir/test/CAPI/ir.c
@@ -463,7 +463,7 @@
   mlirOperationPrintWithFlags(operation, flags, printToStderr, NULL);
   fprintf(stderr, "\n");
   // clang-format off
-  // CHECK: Op print with all flags: %{{.*}} = "arith.constant"() {elts = opaque<"_", "0xDEADBEEF"> : tensor<4xi32>, value = 0 : index} : () -> index loc(unknown)
+  // CHECK: Op print with all flags: %{{.*}} = "arith.constant"() {elts = opaque<"elided_large_const", "0xDEADBEEF"> : tensor<4xi32>, value = 0 : index} : () -> index loc(unknown)
   // clang-format on
 
   mlirOpPrintingFlagsDestroy(flags);
diff --git a/mlir/test/IR/pretty-attributes.mlir b/mlir/test/IR/pretty-attributes.mlir
--- a/mlir/test/IR/pretty-attributes.mlir
+++ b/mlir/test/IR/pretty-attributes.mlir
@@ -5,17 +5,17 @@
 // tensor which passes don't look at directly, this isn't an issue.
 // RUN: mlir-opt %s -mlir-elide-elementsattrs-if-larger=2 | mlir-opt
 
-// CHECK: opaque<"_", "0xDEADBEEF"> : tensor<3xi32>
+// CHECK: opaque<"elided_large_const", "0xDEADBEEF"> : tensor<3xi32>
 "test.dense_attr"() {foo.dense_attr = dense<[1, 2, 3]> : tensor<3xi32>} : () -> ()
 
 // CHECK: dense<[1, 2]> : tensor<2xi32>
 "test.non_elided_dense_attr"() {foo.dense_attr = dense<[1, 2]> : tensor<2xi32>} : () -> ()
 
-// CHECK: opaque<"_", "0xDEADBEEF"> : vector<1x1x10xf16>
+// CHECK: opaque<"elided_large_const", "0xDEADBEEF"> : vector<1x1x10xf16>
 "test.sparse_attr"() {foo.sparse_attr = sparse<[[0, 0, 5]],  -2.0> : vector<1x1x10xf16>} : () -> ()
 
-// CHECK: opaque<"_", "0xDEADBEEF"> : tensor<100xf32>
-"test.opaque_attr"() {foo.opaque_attr = opaque<"_", "0xEBFE"> : tensor<100xf32> } : () -> ()
+// CHECK: opaque<"elided_large_const", "0xDEADBEEF"> : tensor<100xf32>
+"test.opaque_attr"() {foo.opaque_attr = opaque<"elided_large_const", "0xEBFE"> : tensor<100xf32> } : () -> ()
 
 // CHECK: dense<1> : tensor<3xi32>
 "test.dense_splat"() {foo.dense_attr = dense<1> : tensor<3xi32>} : () -> ()
diff --git a/mlir/test/python/ir/operation.py b/mlir/test/python/ir/operation.py
--- a/mlir/test/python/ir/operation.py
+++ b/mlir/test/python/ir/operation.py
@@ -555,7 +555,7 @@
   print(bytes_value)
 
   # Test get_asm with options.
-  # CHECK: value = opaque<"_", "0xDEADBEEF"> : tensor<4xi32>
+  # CHECK: value = opaque<"elided_large_const", "0xDEADBEEF"> : tensor<4xi32>
   # CHECK: "std.return"(%arg0) : (i32) -> () -:4:7
   module.operation.print(
       large_elements_limit=2,