diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index e4c30cdabe8..18280ecefdb 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -2533,7 +2533,7 @@ namespace ts {
 
     function normalizeNonListOptionValue(option: CommandLineOption, basePath: string, value: any): CompilerOptionsValue {
         if (option.isFilePath) {
-            value = normalizePath(combinePaths(basePath, value));
+            value = getNormalizedAbsolutePath(value, basePath);
             if (value === "") {
                 value = ".";
             }
diff --git a/src/tsc/executeCommandLine.ts b/src/tsc/executeCommandLine.ts
index 1496ac39931..201cbb4e8cd 100644
--- a/src/tsc/executeCommandLine.ts
+++ b/src/tsc/executeCommandLine.ts
@@ -241,10 +241,9 @@ namespace ts {
         }
 
         const currentDirectory = sys.getCurrentDirectory();
-        const getCanonicalFileName = createGetCanonicalFileName(sys.useCaseSensitiveFileNames);
         const commandLineOptions = convertToOptionsWithAbsolutePaths(
             commandLine.options,
-            fileName => toPath(fileName, currentDirectory, getCanonicalFileName)
+            fileName => getNormalizedAbsolutePath(fileName, currentDirectory)
         );
         if (configFileName) {
             const configParseResult = parseConfigFileWithSystem(configFileName, commandLineOptions, sys, reportDiagnostic)!; // TODO: GH#18217
diff --git a/tests/baselines/reference/tsc/incremental/no-change-run/when-passing-rootDir-is-in-the-tsconfig.js b/tests/baselines/reference/tsc/incremental/no-change-run/when-passing-rootDir-is-in-the-tsconfig.js
index 4c7d66a03f8..6dd851d6f1f 100644
--- a/tests/baselines/reference/tsc/incremental/no-change-run/when-passing-rootDir-is-in-the-tsconfig.js
+++ b/tests/baselines/reference/tsc/incremental/no-change-run/when-passing-rootDir-is-in-the-tsconfig.js
@@ -3,5 +3,3 @@
 exitCode:: ExitStatus.Success
 
 
-//// [/src/project/built/src/main.js] file written with same contents
-//// [/src/project/built/tsconfig.tsbuildinfo] file written with same contents