diff --git a/src/vs/base/common/map.ts b/src/vs/base/common/map.ts
index 76a9129d26b..830aa8c4a3e 100644
--- a/src/vs/base/common/map.ts
+++ b/src/vs/base/common/map.ts
@@ -5,9 +5,7 @@
 
 import { URI } from 'vs/base/common/uri';
 import { CharCode } from 'vs/base/common/charCode';
-import { compareSubstringIgnoreCase, compare, compareSubstring } from 'vs/base/common/strings';
-import { Schemas } from 'vs/base/common/network';
-import { isLinux } from 'vs/base/common/platform';
+import { compareSubstringIgnoreCase, compare, compareSubstring, compareIgnoreCase } from 'vs/base/common/strings';
 
 export function getOrSet<K, V>(map: Map<K, V>, key: K, value: V): V {
 	let result = map.get(key);
@@ -140,6 +138,8 @@ export class UriIterator implements IKeyIterator<URI> {
 	private _states: UriIteratorState[] = [];
 	private _stateIdx: number = 0;
 
+	constructor(private readonly _ignorePathCasing: boolean) { }
+
 	reset(key: URI): this {
 		this._value = key;
 		this._states = [];
@@ -150,10 +150,7 @@ export class UriIterator implements IKeyIterator<URI> {
 			this._states.push(UriIteratorState.Authority);
 		}
 		if (this._value.path) {
-			//todo@jrieken #107886 the case-sensitive logic is copied form `resources.ts#hasToIgnoreCase`
-			// which cannot be used because it depends on this
-			const caseSensitive = key.scheme === Schemas.file && isLinux;
-			this._pathIterator = new PathIterator(false, caseSensitive);
+			this._pathIterator = new PathIterator(false, !this._ignorePathCasing);
 			this._pathIterator.reset(key.path);
 			if (this._pathIterator.value()) {
 				this._states.push(UriIteratorState.Path);
@@ -185,9 +182,9 @@ export class UriIterator implements IKeyIterator<URI> {
 
 	cmp(a: string): number {
 		if (this._states[this._stateIdx] === UriIteratorState.Scheme) {
-			return compare(a, this._value.scheme);
+			return compareIgnoreCase(a, this._value.scheme);
 		} else if (this._states[this._stateIdx] === UriIteratorState.Authority) {
-			return compareSubstringIgnoreCase(a, this._value.authority);
+			return compareIgnoreCase(a, this._value.authority);
 		} else if (this._states[this._stateIdx] === UriIteratorState.Path) {
 			return this._pathIterator.cmp(a);
 		} else if (this._states[this._stateIdx] === UriIteratorState.Query) {
@@ -229,8 +226,8 @@ class TernarySearchTreeNode<K, V> {
 
 export class TernarySearchTree<K, V> {
 
-	static forUris<E>(): TernarySearchTree<URI, E> {
-		return new TernarySearchTree<URI, E>(new UriIterator());
+	static forUris<E>(ignorePathCasing: boolean = false): TernarySearchTree<URI, E> {
+		return new TernarySearchTree<URI, E>(new UriIterator(ignorePathCasing));
 	}
 
 	static forPaths<E>(): TernarySearchTree<string, E> {
diff --git a/src/vs/base/test/common/map.test.ts b/src/vs/base/test/common/map.test.ts
index 47af3ca64a9..719335c39c6 100644
--- a/src/vs/base/test/common/map.test.ts
+++ b/src/vs/base/test/common/map.test.ts
@@ -368,7 +368,7 @@ suite('Map', () => {
 	});
 
 	test('URIIterator', function () {
-		const iter = new UriIterator();
+		const iter = new UriIterator(false);
 		iter.reset(URI.parse('file:///usr/bin/file.txt'));
 
 		assert.equal(iter.value(), 'file');
@@ -609,7 +609,7 @@ suite('Map', () => {
 
 
 	test('TernarySearchTree (URI) - basics', function () {
-		let trie = new TernarySearchTree<URI, number>(new UriIterator());
+		let trie = new TernarySearchTree<URI, number>(new UriIterator(false));
 
 		trie.set(URI.file('/user/foo/bar'), 1);
 		trie.set(URI.file('/user/foo'), 2);
@@ -629,7 +629,7 @@ suite('Map', () => {
 
 	test('TernarySearchTree (URI) - lookup', function () {
 
-		const map = new TernarySearchTree<URI, number>(new UriIterator());
+		const map = new TernarySearchTree<URI, number>(new UriIterator(false));
 		map.set(URI.parse('http://foo.bar/user/foo/bar'), 1);
 		map.set(URI.parse('http://foo.bar/user/foo?query'), 2);
 		map.set(URI.parse('http://foo.bar/user/foo?QUERY'), 3);
@@ -646,7 +646,7 @@ suite('Map', () => {
 
 	test('TernarySearchTree (PathSegments) - superstr', function () {
 
-		const map = new TernarySearchTree<URI, number>(new UriIterator());
+		const map = new TernarySearchTree<URI, number>(new UriIterator(false));
 		map.set(URI.file('/user/foo/bar'), 1);
 		map.set(URI.file('/user/foo'), 2);
 		map.set(URI.file('/user/foo/flip/flop'), 3);