diff --git a/clang/lib/DependencyScanning/DependencyScannerImpl.cpp b/clang/lib/DependencyScanning/DependencyScannerImpl.cpp
index a953d15115ae6..ec7454616473d 100644
--- a/clang/lib/DependencyScanning/DependencyScannerImpl.cpp
+++ b/clang/lib/DependencyScanning/DependencyScannerImpl.cpp
@@ -412,8 +412,6 @@ void dependencies::initializeScanCompilerInstance(
   ScanInstance.setBuildingModule(false);
   ScanInstance.createVirtualFileSystem(FS, DiagConsumer);
   ScanInstance.createDiagnostics(DiagConsumer, /*ShouldOwnClient=*/false);
-  if (Service.getOpts().Format == ScanningOutputFormat::P1689)
-    ScanInstance.getDiagnostics().setIgnoreAllWarnings(true);
   ScanInstance.createFileManager();
   ScanInstance.createSourceManager();
 
diff --git a/clang/test/ClangScanDeps/p1689-suppress-warnings.cppm b/clang/test/ClangScanDeps/p1689-suppress-warnings.cppm
deleted file mode 100644
index c012c520e5304..0000000000000
--- a/clang/test/ClangScanDeps/p1689-suppress-warnings.cppm
+++ /dev/null
@@ -1,23 +0,0 @@
-// Test that P1689 format suppresses warnings during dependency scanning.
-// This addresses https://github.com/llvm/llvm-project/issues/185394
-
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
-// RUN: split-file %s %t
-
-// Test P1689 format - should NOT emit warnings
-// RUN: clang-scan-deps -format=p1689 -- %clang++ -std=c++20 -I%t -c %t/mylib.cppm -o %t/mylib.o 2>&1 | FileCheck %s
-
-// CHECK-NOT: warning:
-// CHECK: {
-// CHECK: "revision"
-
-//--- header.h
-// Empty header for testing
-
-//--- mylib.cppm
-module;
-
-export module mylib;
-
-#include <header.h>
\ No newline at end of file