diff --git a/build/.cachesalt b/build/.cachesalt
index 8051d84124e..8148922f086 100644
--- a/build/.cachesalt
+++ b/build/.cachesalt
@@ -1 +1 @@
-2024-03-18T08:47:22.277Z
+2024-05-16T08:47:22.277Z
diff --git a/src/vs/base/common/extpath.ts b/src/vs/base/common/extpath.ts
index d7f6723092c..e0ee6968dce 100644
--- a/src/vs/base/common/extpath.ts
+++ b/src/vs/base/common/extpath.ts
@@ -164,7 +164,7 @@ export function isUNC(path: string): boolean {
 
 // Reference: https://en.wikipedia.org/wiki/Filename
 const WINDOWS_INVALID_FILE_CHARS = /[\\/:\*\?"<>\|]/g;
-const UNIX_INVALID_FILE_CHARS = /[\\/]/g;
+const UNIX_INVALID_FILE_CHARS = /[/]/g;
 const WINDOWS_FORBIDDEN_NAMES = /^(con|prn|aux|clock\$|nul|lpt[0-9]|com[0-9])(\.(.*?))?$/i;
 export function isValidBasename(name: string | null | undefined, isWindowsOS: boolean = isWindows): boolean {
 	const invalidFileChars = isWindowsOS ? WINDOWS_INVALID_FILE_CHARS : UNIX_INVALID_FILE_CHARS;
diff --git a/src/vs/base/test/common/extpath.test.ts b/src/vs/base/test/common/extpath.test.ts
index 3c6a4e4979b..c13210daa13 100644
--- a/src/vs/base/test/common/extpath.test.ts
+++ b/src/vs/base/test/common/extpath.test.ts
@@ -50,9 +50,9 @@ suite('Paths', () => {
 		assert.ok(!extpath.isValidBasename(''));
 		assert.ok(extpath.isValidBasename('test.txt'));
 		assert.ok(!extpath.isValidBasename('/test.txt'));
-		assert.ok(!extpath.isValidBasename('\\test.txt'));
 
 		if (isWindows) {
+			assert.ok(!extpath.isValidBasename('\\test.txt'));
 			assert.ok(!extpath.isValidBasename('aux'));
 			assert.ok(!extpath.isValidBasename('Aux'));
 			assert.ok(!extpath.isValidBasename('LPT0'));
@@ -69,6 +69,8 @@ suite('Paths', () => {
 			assert.ok(!extpath.isValidBasename('test.txt\t'));
 			assert.ok(!extpath.isValidBasename('tes:t.txt'));
 			assert.ok(!extpath.isValidBasename('tes"t.txt'));
+		} else {
+			assert.ok(extpath.isValidBasename('\\test.txt'));
 		}
 	});