diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index fd750094296..b209a878804 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -3956,7 +3956,7 @@
         "category": "Error",
         "code": 6306
     },
-    "File '{0}' is not in project '{1}' file list. Projects must list all files or use an 'include' pattern.": {
+    "File '{0}' is not listed within the file list of project '{1}'. Projects must list all files or use an 'include' pattern.": {
         "category": "Error",
         "code": 6307
     },
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index f6b379682ec..2b62da72d24 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -2773,7 +2773,7 @@ namespace ts {
                     // Ignore file that is not emitted
                     if (!sourceFileMayBeEmitted(file, options, isSourceFileFromExternalLibrary, getResolvedProjectReferenceToRedirect)) continue;
                     if (rootPaths.indexOf(file.path) === -1) {
-                        programDiagnostics.add(createCompilerDiagnostic(Diagnostics.File_0_is_not_in_project_1_file_list_Projects_must_list_all_files_or_use_an_include_pattern, file.fileName, options.configFilePath || ""));
+                        programDiagnostics.add(createCompilerDiagnostic(Diagnostics.File_0_is_not_listed_within_the_file_list_of_project_1_Projects_must_list_all_files_or_use_an_include_pattern, file.fileName, options.configFilePath || ""));
                     }
                 }
             }
diff --git a/src/testRunner/unittests/config/projectReferences.ts b/src/testRunner/unittests/config/projectReferences.ts
index 8a29760857b..709c2956e5a 100644
--- a/src/testRunner/unittests/config/projectReferences.ts
+++ b/src/testRunner/unittests/config/projectReferences.ts
@@ -194,7 +194,7 @@ namespace ts {
 
             testProjectReferences(spec, "/primary/tsconfig.json", program => {
                 const errs = program.getOptionsDiagnostics();
-                assertHasError("Reports an error about b.ts not being in the list", errs, Diagnostics.File_0_is_not_in_project_1_file_list_Projects_must_list_all_files_or_use_an_include_pattern);
+                assertHasError("Reports an error about b.ts not being in the list", errs, Diagnostics.File_0_is_not_listed_within_the_file_list_of_project_1_Projects_must_list_all_files_or_use_an_include_pattern);
             });
         });
 
@@ -344,7 +344,7 @@ namespace ts {
             };
             testProjectReferences(spec, "/alpha/tsconfig.json", (program) => {
                 assertHasError("Issues an error about the rootDir", program.getOptionsDiagnostics(), Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files);
-                assertHasError("Issues an error about the fileList", program.getOptionsDiagnostics(), Diagnostics.File_0_is_not_in_project_1_file_list_Projects_must_list_all_files_or_use_an_include_pattern);
+                assertHasError("Issues an error about the fileList", program.getOptionsDiagnostics(), Diagnostics.File_0_is_not_listed_within_the_file_list_of_project_1_Projects_must_list_all_files_or_use_an_include_pattern);
             });
         });
     });
diff --git a/src/testRunner/unittests/tsbuild/resolveJsonModule.ts b/src/testRunner/unittests/tsbuild/resolveJsonModule.ts
index ef2b5a4a674..63f83a0ddb0 100644
--- a/src/testRunner/unittests/tsbuild/resolveJsonModule.ts
+++ b/src/testRunner/unittests/tsbuild/resolveJsonModule.ts
@@ -31,7 +31,7 @@ namespace ts {
 
         it("with resolveJsonModule and include only", () => {
             verifyProjectWithResolveJsonModule("/src/tsconfig_withInclude.json", [
-                Diagnostics.File_0_is_not_in_project_1_file_list_Projects_must_list_all_files_or_use_an_include_pattern,
+                Diagnostics.File_0_is_not_listed_within_the_file_list_of_project_1_Projects_must_list_all_files_or_use_an_include_pattern,
                 "/src/src/hello.json",
                 "/src/tsconfig_withInclude.json"
             ]);