-; RUN: opt -disable-output -passes=no-op-module,no-op-module %s
-; RUN: opt -disable-output -passes='module(no-op-module,no-op-module)' %s
+; RUN: opt -disable-output -debug-pass-manager \
+; RUN: -passes=no-op-module,no-op-module %s 2>&1 \
+; RUN: | FileCheck %s --check-prefix=CHECK-TWO-NOOP-MP
+; CHECK-TWO-NOOP-MP: Starting module pass manager
+; CHECK-TWO-NOOP-MP: Running module pass: NoOpModulePass
+; CHECK-TWO-NOOP-MP: Running module pass: NoOpModulePass
+; CHECK-TWO-NOOP-MP: Finished module pass manager
+
+; RUN: opt -disable-output -debug-pass-manager \
+; RUN: -passes='module(no-op-module,no-op-module)' %s 2>&1 \
+; RUN: | FileCheck %s --check-prefix=CHECK-NESTED-TWO-NOOP-MP
+; CHECK-NESTED-TWO-NOOP-MP: Starting module pass manager
+; CHECK-NESTED-TWO-NOOP-MP: Running module pass: ModulePassManager
+; CHECK-NESTED-TWO-NOOP-MP: Starting module pass manager
+; CHECK-NESTED-TWO-NOOP-MP: Running module pass: NoOpModulePass
+; CHECK-NESTED-TWO-NOOP-MP: Running module pass: NoOpModulePass
+; CHECK-NESTED-TWO-NOOP-MP: Finished module pass manager
+; CHECK-NESTED-TWO-NOOP-MP: Finished module pass manager