diff --git a/clang/include/clang/Basic/DiagnosticSerializationKinds.td b/clang/include/clang/Basic/DiagnosticSerializationKinds.td
--- a/clang/include/clang/Basic/DiagnosticSerializationKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSerializationKinds.td
@@ -135,7 +135,7 @@
   InGroup<DiagGroup<"eager-load-cxx-named-modules">>;
 
 def warn_reading_std_cxx_module_by_implicit_paths : Warning<
-  "it is deprecated to read module '%0' implcitly; it is going to be removed in clang18; "
+  "it is deprecated to read module '%0' implicitly; it is going to be removed in clang 18; "
   "consider to specify the dependencies explicitly">,
   InGroup<DiagGroup<"read-modules-implicitly">>;
 } // let CategoryName
diff --git a/clang/test/Modules/no-implicit-std-cxx-module.cppm b/clang/test/Modules/no-implicit-std-cxx-module.cppm
--- a/clang/test/Modules/no-implicit-std-cxx-module.cppm
+++ b/clang/test/Modules/no-implicit-std-cxx-module.cppm
@@ -7,7 +7,7 @@
 // RUN:     -o %t/a.pcm
 // RUN: %clang_cc1 -std=c++20 %t/user.cpp -fmodule-file=a=%t/a.pcm -verify -fsyntax-only
 // RUN: %clang_cc1 -std=c++20 %t/user.cpp -fmodule-file=a=%t/a.pcm -verify -fsyntax-only \
-// RUN:     -Wno-read-modules-implicitly -DNO_DIAG 
+// RUN:     -Wno-read-modules-implicitly -DNO_DIAG
 // RUN: %clang_cc1 -std=c++20 %t/user.cpp -fmodule-file=a=%t/a.pcm -fmodule-file=b=%t/b.pcm \
 // RUN:     -DNO_DIAG -verify -fsyntax-only
 //
@@ -35,7 +35,7 @@
     return b() + 43;
 }
 
-// CHECK: it is deprecated to read module 'b' implcitly;
+// CHECK: it is deprecated to read module 'b' implicitly;
 
 // CHECK-CORRECT-NOT: warning
 // CHECK-CORRECT-NOT: error
@@ -47,9 +47,9 @@
 #ifdef NO_DIAG
 // expected-no-diagnostics
 #else
- // expected-warning@+2 {{it is deprecated to read module 'b' implcitly;}}
+ // expected-warning@+2 {{it is deprecated to read module 'b' implicitly;}}
 #endif
 import a;
 int use() {
     return a();
-}
\ No newline at end of file
+}