diff --git a/mlir/include/mlir/Pass/Pass.h b/mlir/include/mlir/Pass/Pass.h
--- a/mlir/include/mlir/Pass/Pass.h
+++ b/mlir/include/mlir/Pass/Pass.h
@@ -118,7 +118,7 @@
   virtual LogicalResult initializeOptions(StringRef options);
 
   /// Prints out the pass in the textual representation of pipelines. If this is
-  /// an adaptor pass, print with the op_name(sub_pass,...) format.
+  /// an adaptor pass, print its pass managers.
   void printAsTextualPipeline(raw_ostream &os);
 
   //===--------------------------------------------------------------------===//
diff --git a/mlir/lib/Pass/Pass.cpp b/mlir/lib/Pass/Pass.cpp
--- a/mlir/lib/Pass/Pass.cpp
+++ b/mlir/lib/Pass/Pass.cpp
@@ -50,17 +50,13 @@
 }
 
 /// Prints out the pass in the textual representation of pipelines. If this is
-/// an adaptor pass, print with the op_name(sub_pass,...) format.
+/// an adaptor pass, print its pass managers.
 void Pass::printAsTextualPipeline(raw_ostream &os) {
-  // Special case for adaptors to use the 'op_name(sub_passes)' format.
+  // Special case for adaptors to print its pass managers.
   if (auto *adaptor = dyn_cast<OpToOpPassAdaptor>(this)) {
     llvm::interleave(
         adaptor->getPassManagers(),
-        [&](OpPassManager &pm) {
-          os << pm.getOpAnchorName() << "(";
-          pm.printAsTextualPipeline(os);
-          os << ")";
-        },
+        [&](OpPassManager &pm) { pm.printAsTextualPipeline(os); },
         [&] { os << ","; });
     return;
   }
@@ -355,26 +351,22 @@
   return impl->getOpAnchorName();
 }
 
-/// Prints out the given passes as the textual representation of a pipeline.
-static void printAsTextualPipeline(ArrayRef<std::unique_ptr<Pass>> passes,
-                                   raw_ostream &os) {
+/// Prints out the passes of the pass manager as the textual representation
+/// of pipelines.
+void OpPassManager::printAsTextualPipeline(raw_ostream &os) const {
+  os << getOpAnchorName() << "(";
   llvm::interleave(
-      passes,
+      impl->passes,
       [&](const std::unique_ptr<Pass> &pass) {
         pass->printAsTextualPipeline(os);
       },
-      [&] { os << ","; });
-}
-
-/// Prints out the passes of the pass manager as the textual representation
-/// of pipelines.
-void OpPassManager::printAsTextualPipeline(raw_ostream &os) const {
-  ::printAsTextualPipeline(impl->passes, os);
+      [&]() { os << ","; });
+  os << ")";
 }
 
 void OpPassManager::dump() {
   llvm::errs() << "Pass Manager with " << impl->passes.size() << " passes: ";
-  ::printAsTextualPipeline(impl->passes, llvm::errs());
+  printAsTextualPipeline(llvm::errs());
   llvm::errs() << "\n";
 }
 
diff --git a/mlir/test/CAPI/pass.c b/mlir/test/CAPI/pass.c
--- a/mlir/test/CAPI/pass.c
+++ b/mlir/test/CAPI/pass.c
@@ -145,20 +145,22 @@
   mlirOpPassManagerAddOwnedPass(nestedFuncPm, printOpStatPass);
 
   // Print the top level pass manager
-  // CHECK: Top-level: builtin.module(func.func(print-op-stats{json=false}))
+  //      CHECK: Top-level: builtin.module(
+  // CHECK-SAME:   builtin.module(func.func(print-op-stats{json=false}))
+  // CHECK-SAME: )
   fprintf(stderr, "Top-level: ");
   mlirPrintPassPipeline(mlirPassManagerGetAsOpPassManager(pm), printToStderr,
                         NULL);
   fprintf(stderr, "\n");
 
   // Print the pipeline nested one level down
-  // CHECK: Nested Module: func.func(print-op-stats{json=false})
+  // CHECK: Nested Module: builtin.module(func.func(print-op-stats{json=false}))
   fprintf(stderr, "Nested Module: ");
   mlirPrintPassPipeline(nestedModulePm, printToStderr, NULL);
   fprintf(stderr, "\n");
 
   // Print the pipeline nested two levels down
-  // CHECK: Nested Module>Func: print-op-stats
+  // CHECK: Nested Module>Func: func.func(print-op-stats{json=false})
   fprintf(stderr, "Nested Module>Func: ");
   mlirPrintPassPipeline(nestedFuncPm, printToStderr, NULL);
   fprintf(stderr, "\n");
@@ -197,8 +199,10 @@
     exit(EXIT_FAILURE);
   }
 
-  // CHECK: Round-trip: builtin.module(func.func(print-op-stats{json=false}),
-  // func.func(print-op-stats{json=false}))
+  //      CHECK: Round-trip: builtin.module(builtin.module(
+  // CHECK-SAME:   func.func(print-op-stats{json=false}),
+  // CHECK-SAME:   func.func(print-op-stats{json=false})
+  // CHECK-SAME: ))
   fprintf(stderr, "Round-trip: ");
   mlirPrintPassPipeline(mlirPassManagerGetAsOpPassManager(pm), printToStderr,
                         NULL);
diff --git a/mlir/test/Pass/pipeline-options-parsing.mlir b/mlir/test/Pass/pipeline-options-parsing.mlir
--- a/mlir/test/Pass/pipeline-options-parsing.mlir
+++ b/mlir/test/Pass/pipeline-options-parsing.mlir
@@ -14,4 +14,4 @@
 
 // CHECK_1: test-options-pass{list=1,2,3,4,5 string=nested_pipeline{arg1=10 arg2=" {} " arg3=true} string-list=a,b,c,d}
 // CHECK_2: test-options-pass{list=1 string= string-list=a,b}
-// CHECK_3: builtin.module(func.func(test-options-pass{list=3 string= }),func.func(test-options-pass{list=1,2,3,4 string= }))
+// CHECK_3: builtin.module(builtin.module(func.func(test-options-pass{list=3 string= }),func.func(test-options-pass{list=1,2,3,4 string= })))
diff --git a/mlir/test/python/pass_manager.py b/mlir/test/python/pass_manager.py
--- a/mlir/test/python/pass_manager.py
+++ b/mlir/test/python/pass_manager.py
@@ -46,7 +46,7 @@
 
     # A registered pass should parse successfully.
     pm = PassManager.parse("builtin.module(func.func(print-op-stats{json=false}))")
-    # CHECK: Roundtrip: builtin.module(func.func(print-op-stats{json=false}))
+    # CHECK: Roundtrip: builtin.module(builtin.module(func.func(print-op-stats{json=false})))
     log("Roundtrip: ", pm)
 run(testParseSuccess)