diff --git a/src/git/gitProvider.ts b/src/git/gitProvider.ts
index 8150c17..6595df5 100644
--- a/src/git/gitProvider.ts
+++ b/src/git/gitProvider.ts
@@ -344,7 +344,7 @@ export interface GitProvider {
 	// 	options?: { ref?: string | undefined },
 	// ): Promise<string | undefined>;
 
-	getRepoPath(filePath: string, isDirectory: boolean): Promise<string | undefined>;
+	getRepoPath(filePath: string, isDirectory?: boolean): Promise<string | undefined>;
 
 	// getRepoPathOrActive(uri: Uri | undefined, editor: TextEditor | undefined): Promise<string | undefined>;
 	// getRepositories(predicate?: (repo: Repository) => boolean): Promise<Iterable<Repository>>;
@@ -397,11 +397,6 @@ export interface GitProvider {
 	isActiveRepoPath(repoPath: string | undefined, editor?: TextEditor): Promise<boolean>;
 
 	isTrackable(uri: Uri): boolean;
-	isTracked(
-		fileNameOrUri: string | GitUri,
-		repoPath?: string,
-		options?: { ref?: string | undefined; skipCacheUpdate?: boolean | undefined },
-	): Promise<boolean>;
 
 	getDiffTool(repoPath?: string): Promise<string | undefined>;
 	openDiffTool(
diff --git a/src/git/gitProviderService.ts b/src/git/gitProviderService.ts
index 07e1cec..b2493c4 100644
--- a/src/git/gitProviderService.ts
+++ b/src/git/gitProviderService.ts
@@ -28,6 +28,7 @@ import {
 import { Container } from '../container';
 import { Logger } from '../logger';
 import { Arrays, debug, gate, Iterables, log, Paths, Promises, Strings } from '../system';
+import { PromiseOrValue } from '../system/promise';
 import { vslsUriPrefixRegex } from '../vsls/vsls';
 import { ProviderNotFoundError } from './errors';
 import {
@@ -105,6 +106,20 @@ export class GitProviderService implements Disposable {
 	private fireProvidersChanged(added?: GitProvider[], removed?: GitProvider[]) {
 		this._etag = Date.now();
 
+		if (this._pathToRepoPathCache.size !== 0) {
+			if (removed?.length) {
+				// If a repository was removed, clear the cache for all paths
+				this._pathToRepoPathCache.clear();
+			} else if (added?.length) {
+				// If a provider was added, only preserve paths with a resolved repoPath
+				for (const [key, value] of this._pathToRepoPathCache) {
+					if (value === null || Promises.is(value)) {
+						this._pathToRepoPathCache.delete(key);
+					}
+				}
+			}
+		}
+
 		this._onDidChangeProviders.fire({ added: added ?? [], removed: removed ?? [] });
 	}
 
@@ -115,6 +130,20 @@ export class GitProviderService implements Disposable {
 	private fireRepositoriesChanged(added?: Repository[], removed?: Repository[]) {
 		this._etag = Date.now();
 
+		if (this._pathToRepoPathCache.size !== 0) {
+			if (removed?.length) {
+				// If a repository was removed, clear the cache for all paths
+				this._pathToRepoPathCache.clear();
+			} else if (added?.length) {
+				// If a repository was added, only preserve paths with a resolved repoPath
+				for (const [key, value] of this._pathToRepoPathCache) {
+					if (value === null || Promises.is(value)) {
+						this._pathToRepoPathCache.delete(key);
+					}
+				}
+			}
+		}
+
 		this._onDidChangeRepositories.fire({ added: added ?? [], removed: removed ?? [] });
 	}
 
@@ -193,7 +222,7 @@ export class GitProviderService implements Disposable {
 				configuration.getAny<boolean | 'subFolders' | 'openEditors'>(
 					BuiltInGitConfiguration.AutoRepositoryDetection,
 				) ?? true;
-			if (autoRepositoryDetection !== false) {
+			if (autoRepositoryDetection !== false && autoRepositoryDetection !== 'openEditors') {
 				void this.discoverRepositories(e.added);
 			}
 		}
@@ -273,7 +302,7 @@ export class GitProviderService implements Disposable {
 	// }
 
 	getCachedRepository(repoPath: string): Repository | undefined {
-		return this._repositories.get(repoPath);
+		return repoPath && this._repositories.size !== 0 ? this._repositories.get(repoPath) : undefined;
 	}
 
 	/**
@@ -367,7 +396,7 @@ export class GitProviderService implements Disposable {
 					BuiltInGitConfiguration.AutoRepositoryDetection,
 				) ?? true;
 
-			if (autoRepositoryDetection !== false) {
+			if (autoRepositoryDetection !== false && autoRepositoryDetection !== 'openEditors') {
 				void this.discoverRepositories(workspaceFolders);
 
 				return;
@@ -1371,66 +1400,25 @@ export class GitProviderService implements Disposable {
 		return provider.getRemotesCore(path, providers, options);
 	}
 
-	async getRepoPath(filePath: string, options?: { ref?: string }): Promise<string | undefined>;
-	async getRepoPath(uri: Uri | undefined, options?: { ref?: string }): Promise<string | undefined>;
+	async getRepoPath(filePath: string): Promise<string | undefined>;
+	async getRepoPath(uri: Uri | undefined): Promise<string | undefined>;
 	@log<GitProviderService['getRepoPath']>({ exit: path => `returned ${path}` })
-	async getRepoPath(
-		filePathOrUri: string | Uri | undefined,
-		options?: { ref?: string },
-	): Promise<string | undefined> {
+	async getRepoPath(filePathOrUri: string | Uri | undefined): Promise<string | undefined> {
 		if (filePathOrUri == null) return this.highlanderRepoPath;
 		if (GitUri.is(filePathOrUri)) return filePathOrUri.repoPath;
 
-		const cc = Logger.getCorrelationContext();
+		// const autoRepositoryDetection =
+		// 	configuration.getAny<boolean | 'subFolders' | 'openEditors'>(
+		// 		BuiltInGitConfiguration.AutoRepositoryDetection,
+		// 	) ?? true;
 
-		// Don't save the tracking info to the cache, because we could be looking in the wrong place (e.g. looking in the root when the file is in a submodule)
-		let repo = await this.getRepository(filePathOrUri, { ...options, skipCacheUpdate: true });
-		if (repo != null) return repo.path;
-
-		const { provider, path } = this.getProvider(filePathOrUri);
-		const rp = await provider.getRepoPath(path, false);
-
-		// const rp = await this.getRepoPathCore(
-		// 	typeof filePathOrUri === 'string' ? filePathOrUri : filePathOrUri.fsPath,
-		// 	false,
+		// const repo = await this.getRepository(
+		// 	filePathOrUri,
+		// 	autoRepositoryDetection === true || autoRepositoryDetection === 'openEditors',
 		// );
-		if (rp == null) return undefined;
-
-		// Recheck this._repositoryTree.get(rp) to make sure we haven't already tried adding this due to awaits
-		if (this._repositories.get(rp) != null) return rp;
 
-		const isVslsScheme =
-			typeof filePathOrUri === 'string' ? undefined : filePathOrUri.scheme === DocumentSchemes.Vsls;
-
-		// If this new repo is inside one of our known roots and we we don't already know about, add it
-		const root = this.findRepositoryForPath(rp, isVslsScheme);
-
-		let folder;
-		if (root != null) {
-			// Not sure why I added this for vsls (I can't see a reason for it anymore), but if it is added it will break submodules
-			// rp = root.path;
-			folder = root.folder;
-		} else {
-			folder = workspace.getWorkspaceFolder(GitUri.file(rp, isVslsScheme));
-			if (folder == null) {
-				const parts = rp.split(slash);
-				folder = {
-					uri: GitUri.file(rp, isVslsScheme),
-					name: parts[parts.length - 1],
-					index: this.container.git.repositoryCount,
-				};
-			}
-		}
-
-		Logger.log(cc, `Repository found in '${rp}'`);
-		repo = provider.createRepository(folder, rp, false);
-		this._repositories.set(rp, repo);
-
-		void this.updateContext();
-		// Send a notification that the repositories changed
-		queueMicrotask(() => this.fireRepositoriesChanged([repo!]));
-
-		return rp;
+		const repo = await this.getRepository(filePathOrUri, true);
+		return repo?.path;
 	}
 
 	@log<GitProviderService['getRepoPathOrActive']>({
@@ -1443,60 +1431,102 @@ export class GitProviderService implements Disposable {
 		return this.getActiveRepoPath(editor);
 	}
 
-	async getRepository(
-		repoPath: string,
-		options?: { ref?: string; skipCacheUpdate?: boolean },
-	): Promise<Repository | undefined>;
-	async getRepository(
-		uri: Uri,
-		options?: { ref?: string; skipCacheUpdate?: boolean },
-	): Promise<Repository | undefined>;
-	async getRepository(
-		repoPathOrUri: string | Uri,
-		options?: { ref?: string; skipCacheUpdate?: boolean },
-	): Promise<Repository | undefined>;
-	@log<GitProviderService['getRepository']>({
-		exit: repo => `returned ${repo != null ? `${repo.path}` : 'undefined'}`,
-	})
-	async getRepository(
-		repoPathOrUri: string | Uri,
-		options: { ref?: string; skipCacheUpdate?: boolean } = {},
-	): Promise<Repository | undefined> {
-		let isVslsScheme;
+	private _pathToRepoPathCache = new Map<string, PromiseOrValue<string | null>>();
 
-		let path: string;
-		if (typeof repoPathOrUri === 'string') {
-			const repo = this._repositories.get(repoPathOrUri);
-			if (repo != null) return repo;
+	async getRepository(repoPath: string, createIfNeeded?: boolean): Promise<Repository | undefined>;
+	async getRepository(uri: Uri, createIfNeeded?: boolean): Promise<Repository | undefined>;
+	async getRepository(repoPathOrUri: string | Uri, createIfNeeded?: boolean): Promise<Repository | undefined>;
+	@log<GitProviderService['getRepository']>({ exit: repo => `returned ${repo?.path ?? 'undefined'}` })
+	async getRepository(repoPathOrUri: string | Uri, createIfNeeded: boolean = false): Promise<Repository | undefined> {
+		if (!createIfNeeded && this.repositoryCount === 0) return undefined;
 
-			path = repoPathOrUri;
-			isVslsScheme = undefined;
+		const cc = Logger.getCorrelationContext();
+
+		let isVslsScheme: boolean | undefined;
+		let repo: Repository | undefined;
+		let rp: string | null;
+
+		let filePath: string;
+		if (typeof repoPathOrUri === 'string') {
+			filePath = Strings.normalizePath(repoPathOrUri);
 		} else {
-			if (GitUri.is(repoPathOrUri)) {
-				if (repoPathOrUri.repoPath) {
-					const repo = this._repositories.get(repoPathOrUri.repoPath);
-					if (repo != null) return repo;
-				}
+			if (GitUri.is(repoPathOrUri) && repoPathOrUri.repoPath) {
+				repo = this.getCachedRepository(repoPathOrUri.repoPath);
+				if (repo != null) return repo;
+			}
+
+			filePath = Strings.normalizePath(repoPathOrUri.fsPath);
+			isVslsScheme = repoPathOrUri.scheme === DocumentSchemes.Vsls;
+		}
+
+		repo = this.getCachedRepository(filePath);
+		if (repo != null) return repo;
+
+		let repoPathOrPromise = this._pathToRepoPathCache.get(filePath);
+		if (repoPathOrPromise !== undefined) {
+			rp = Promises.is(repoPathOrPromise) ? await repoPathOrPromise : repoPathOrPromise;
+			// If the repoPath is explicitly null, then we know no repo exists
+			if (rp === null) return undefined;
+
+			repo = this.getCachedRepository(rp);
+			// If the repo exists or if we aren't creating it, just return what we found cached
+			if (!createIfNeeded || repo != null) return repo;
+		}
+
+		async function findRepoPath(this: GitProviderService): Promise<string | null> {
+			const { provider, path } = this.getProvider(filePath);
+			rp = (await provider.getRepoPath(path)) ?? null;
+			// Store the found repoPath for this filePath, so we can avoid future lookups for the filePath
+			this._pathToRepoPathCache.set(filePath, rp);
+
+			if (rp == null) return null;
+
+			// Store the found repoPath for itself, so we can avoid future lookups for the repoPath
+			this._pathToRepoPathCache.set(rp, rp);
 
-				path = repoPathOrUri.fsPath;
+			if (!createIfNeeded || this._repositories.has(rp)) return rp;
+
+			// If this new repo is inside one of our known roots and we we don't already know about, add it
+			const root = this.findRepositoryForPath(rp, isVslsScheme);
+
+			let folder;
+			if (root != null) {
+				// Not sure why I added this for vsls (I can't see a reason for it anymore), but if it is added it will break submodules
+				// rp = root.path;
+				folder = root.folder;
 			} else {
-				path = repoPathOrUri.fsPath;
+				folder = workspace.getWorkspaceFolder(GitUri.file(rp, isVslsScheme));
+				if (folder == null) {
+					const parts = rp.split(slash);
+					folder = {
+						uri: GitUri.file(rp, isVslsScheme),
+						name: parts[parts.length - 1],
+						index: this.repositoryCount,
+					};
+				}
 			}
 
-			isVslsScheme = repoPathOrUri.scheme === DocumentSchemes.Vsls;
+			Logger.log(cc, `Repository found in '${rp}'`);
+			repo = provider.createRepository(folder, rp, false);
+			this._repositories.set(rp, repo);
+
+			void this.updateContext();
+			// Send a notification that the repositories changed
+			queueMicrotask(() => this.fireRepositoriesChanged([repo!]));
+
+			return rp;
 		}
 
-		const repo = this.findRepositoryForPath(path, isVslsScheme);
-		if (repo == null) return undefined;
+		repoPathOrPromise = findRepoPath.call(this);
+		this._pathToRepoPathCache.set(filePath, repoPathOrPromise);
 
-		// Make sure the file is tracked in this repo before returning -- it could be from a submodule
-		if (!(await this.isTracked(path, repo.path, options))) return undefined;
-		return repo;
+		rp = await repoPathOrPromise;
+		return rp != null ? this.getCachedRepository(rp) : undefined;
 	}
 
 	@debug()
 	private findRepositoryForPath(path: string, isVslsScheme: boolean | undefined): Repository | undefined {
-		if (this._repositories.size === 0) return undefined;
+		if (this.repositoryCount === 0) return undefined;
 
 		function findBySubPath(repositories: Map<string, Repository>, path: string) {
 			const repos = [...repositories.values()].sort((a, b) => a.path.length - b.path.length);
@@ -1668,17 +1698,6 @@ export class GitProviderService implements Disposable {
 		return provider.isTrackable(uri);
 	}
 
-	private async isTracked(
-		fileName: string,
-		repoPath: string | Uri,
-		options?: { ref?: string; skipCacheUpdate?: boolean },
-	): Promise<boolean> {
-		if (options?.ref === GitRevision.deletedOrMissing) return false;
-
-		const { provider, path } = this.getProvider(repoPath);
-		return provider.isTracked(fileName, path, options);
-	}
-
 	@log()
 	async getDiffTool(repoPath?: string | Uri): Promise<string | undefined> {
 		if (repoPath == null) return undefined;
diff --git a/src/git/providers/localGitProvider.ts b/src/git/providers/localGitProvider.ts
index 929f052..0e9cb0f 100644
--- a/src/git/providers/localGitProvider.ts
+++ b/src/git/providers/localGitProvider.ts
@@ -23,6 +23,7 @@ import { Container } from '../../container';
 import { LogCorrelationContext, Logger } from '../../logger';
 import { Messages } from '../../messages';
 import { Arrays, debug, Functions, gate, Iterables, log, Paths, Promises, Strings, Versions } from '../../system';
+import { PromiseOrValue } from '../../system/promise';
 import {
 	CachedBlame,
 	CachedDiff,
@@ -119,7 +120,7 @@ export class LocalGitProvider implements GitProvider, Disposable {
 	private readonly _remotesWithApiProviderCache = new Map<string, GitRemote<RichRemoteProvider> | null>();
 	private readonly _stashesCache = new Map<string, GitStash | null>();
 	private readonly _tagsCache = new Map<string, Promise<GitTag[]>>();
-	private readonly _trackedCache = new Map<string, boolean | Promise<boolean>>();
+	private readonly _trackedCache = new Map<string, PromiseOrValue<boolean>>();
 	private readonly _userMapCache = new Map<string, GitUser | null>();
 
 	constructor(private readonly container: Container) {
@@ -258,7 +259,7 @@ export class LocalGitProvider implements GitProvider, Disposable {
 			configuration.getAny<boolean | 'subFolders' | 'openEditors'>(
 				BuiltInGitConfiguration.AutoRepositoryDetection,
 			) ?? true;
-		if (autoRepositoryDetection === false) return [];
+		if (autoRepositoryDetection === false || autoRepositoryDetection === 'openEditors') return [];
 
 		try {
 			void (await this.ensureGit());
@@ -2079,7 +2080,7 @@ export class LocalGitProvider implements GitProvider, Disposable {
 		key: string,
 		cc: LogCorrelationContext | undefined,
 	): Promise<GitLog | undefined> {
-		if (!(await this.isTracked(fileName, repoPath, { ref: ref }))) {
+		if (!(await this.isTracked(fileName, repoPath, ref))) {
 			Logger.log(cc, `Skipping log; '${fileName}' is not tracked`);
 			return emptyPromise as Promise<GitLog>;
 		}
@@ -3014,13 +3015,22 @@ export class LocalGitProvider implements GitProvider, Disposable {
 		}
 	}
 
+	@gate()
 	@debug()
-	async getRepoPath(filePath: string, isDirectory: boolean): Promise<string | undefined> {
+	async getRepoPath(filePath: string, isDirectory?: boolean): Promise<string | undefined> {
 		const cc = Logger.getCorrelationContext();
 
 		let repoPath: string | undefined;
 		try {
-			const path = isDirectory ? filePath : paths.dirname(filePath);
+			let path: string;
+			if (isDirectory) {
+				path = filePath;
+			} else {
+				const stat = await new Promise<fs.Stats | undefined>(resolve =>
+					fs.stat(filePath, (err, stat) => resolve(err == null ? stat : undefined)),
+				);
+				path = stat?.isDirectory() ? filePath : paths.dirname(filePath);
+			}
 
 			repoPath = await Git.rev_parse__show_toplevel(path);
 			if (repoPath == null) return repoPath;
@@ -3406,69 +3416,57 @@ export class LocalGitProvider implements GitProvider, Disposable {
 		);
 	}
 
-	@log<LocalGitProvider['isTracked']>({ exit: tracked => `returned ${tracked}`, singleLine: true })
-	async isTracked(
-		fileNameOrUri: string | GitUri,
-		repoPath?: string,
-		options: { ref?: string; skipCacheUpdate?: boolean } = {},
-	): Promise<boolean> {
-		if (options.ref === GitRevision.deletedOrMissing) return false;
-
-		let ref = options.ref;
+	private async isTracked(filePath: string, repoPath?: string, ref?: string): Promise<boolean>;
+	private async isTracked(uri: GitUri): Promise<boolean>;
+	@log<LocalGitProvider['isTracked']>({ exit: tracked => `returned ${tracked}` /*, singleLine: true }*/ })
+	private async isTracked(filePathOrUri: string | GitUri, repoPath?: string, ref?: string): Promise<boolean> {
 		let cacheKey: string;
-		let fileName: string;
-		if (typeof fileNameOrUri === 'string') {
-			[fileName, repoPath] = Paths.splitPath(fileNameOrUri, repoPath);
-			cacheKey = GitUri.toKey(fileNameOrUri);
+		let relativeFilePath: string;
+
+		if (typeof filePathOrUri === 'string') {
+			if (ref === GitRevision.deletedOrMissing) return false;
+
+			cacheKey = ref ? `${ref}:${Strings.normalizePath(filePathOrUri)}` : Strings.normalizePath(filePathOrUri);
+			[relativeFilePath, repoPath] = Paths.splitPath(filePathOrUri, repoPath);
 		} else {
-			if (!this.isTrackable(fileNameOrUri)) return false;
+			if (!this.isTrackable(filePathOrUri)) return false;
 
-			fileName = fileNameOrUri.fsPath;
-			repoPath = fileNameOrUri.repoPath;
-			ref = fileNameOrUri.sha;
-			cacheKey = GitUri.toKey(fileName);
+			// Always use the ref of the GitUri
+			ref = filePathOrUri.sha;
+			cacheKey = ref
+				? `${ref}:${Strings.normalizePath(filePathOrUri.fsPath)}`
+				: Strings.normalizePath(filePathOrUri.fsPath);
+			relativeFilePath = filePathOrUri.fsPath;
+			repoPath = filePathOrUri.repoPath;
 		}
 
 		if (ref != null) {
-			cacheKey += `:${ref}`;
+			cacheKey = `${ref}:${cacheKey}`;
 		}
 
 		let tracked = this._trackedCache.get(cacheKey);
-		if (tracked != null) {
-			tracked = await tracked;
-
-			return tracked;
-		}
-
-		tracked = this.isTrackedCore(fileName, repoPath == null ? emptyStr : repoPath, ref);
-		if (options.skipCacheUpdate) {
-			tracked = await tracked;
-
-			return tracked;
-		}
+		if (tracked != null) return tracked;
 
+		tracked = this.isTrackedCore(relativeFilePath, repoPath ?? emptyStr, ref);
 		this._trackedCache.set(cacheKey, tracked);
+
 		tracked = await tracked;
 		this._trackedCache.set(cacheKey, tracked);
-
 		return tracked;
 	}
 
+	@debug()
 	private async isTrackedCore(fileName: string, repoPath: string, ref?: string) {
 		if (ref === GitRevision.deletedOrMissing) return false;
 
 		try {
 			// Even if we have a ref, check first to see if the file exists (that way the cache will be better reused)
-			let tracked = Boolean(await Git.ls_files(repoPath == null ? emptyStr : repoPath, fileName));
-			if (!tracked && ref != null) {
-				tracked = Boolean(await Git.ls_files(repoPath == null ? emptyStr : repoPath, fileName, { ref: ref }));
+			let tracked = Boolean(await Git.ls_files(repoPath, fileName));
+			if (!tracked && ref != null && !GitRevision.isUncommitted(ref)) {
+				tracked = Boolean(await Git.ls_files(repoPath, fileName, { ref: ref }));
 				// If we still haven't found this file, make sure it wasn't deleted in that ref (i.e. check the previous)
 				if (!tracked) {
-					tracked = Boolean(
-						await Git.ls_files(repoPath == null ? emptyStr : repoPath, fileName, {
-							ref: `${ref}^`,
-						}),
-					);
+					tracked = Boolean(await Git.ls_files(repoPath, fileName, { ref: `${ref}^` }));
 				}
 			}
 			return tracked;
diff --git a/src/system/path.ts b/src/system/path.ts
index 96955f0..d87b2a0 100644
--- a/src/system/path.ts
+++ b/src/system/path.ts
@@ -74,19 +74,19 @@ export function isDescendent(uriOrPath: Uri | string, baseUriOrPath: Uri | strin
 	);
 }
 
-export function splitPath(fileName: string, repoPath: string | undefined, extract: boolean = true): [string, string] {
+export function splitPath(filePath: string, repoPath: string | undefined, extract: boolean = true): [string, string] {
 	if (repoPath) {
-		fileName = normalizePath(fileName);
+		filePath = normalizePath(filePath);
 		repoPath = normalizePath(repoPath);
 
 		const normalizedRepoPath = (repoPath.endsWith(slash) ? repoPath : `${repoPath}/`).toLowerCase();
-		if (fileName.toLowerCase().startsWith(normalizedRepoPath)) {
-			fileName = fileName.substring(normalizedRepoPath.length);
+		if (filePath.toLowerCase().startsWith(normalizedRepoPath)) {
+			filePath = filePath.substring(normalizedRepoPath.length);
 		}
 	} else {
-		repoPath = normalizePath(extract ? paths.dirname(fileName) : repoPath!);
-		fileName = normalizePath(extract ? paths.basename(fileName) : fileName);
+		repoPath = normalizePath(extract ? paths.dirname(filePath) : repoPath!);
+		filePath = normalizePath(extract ? paths.basename(filePath) : filePath);
 	}
 
-	return [fileName, repoPath];
+	return [filePath, repoPath];
 }
diff --git a/src/system/promise.ts b/src/system/promise.ts
index e0adc7b..62a113f 100644
--- a/src/system/promise.ts
+++ b/src/system/promise.ts
@@ -2,6 +2,8 @@
 import { CancellationToken } from 'vscode';
 import { map } from './iterable';
 
+export type PromiseOrValue<T> = Promise<T> | T;
+
 export class CancellationError<T extends Promise<any> = Promise<any>> extends Error {
 	constructor(public readonly promise: T, message: string) {
 		super(message);
@@ -81,8 +83,8 @@ export function first<T>(promises: Promise<T>[], predicate: (value: T) => boolea
 	return Promise.race(newPromises);
 }
 
-export function is<T>(obj: T | Promise<T>): obj is Promise<T> {
-	return obj != null && typeof (obj as Promise<T>).then === 'function';
+export function is<T>(obj: PromiseLike<T> | T): obj is Promise<T> {
+	return obj instanceof Promise || typeof (obj as PromiseLike<T>)?.then === 'function';
 }
 
 export function raceAll<TPromise>(