diff --git a/lib/glob-helpers.cjs b/lib/glob-helpers.cjs
index 1a8074053..1145f793e 100644
--- a/lib/glob-helpers.cjs
+++ b/lib/glob-helpers.cjs
@@ -117,6 +117,10 @@ function normalizePattern(pattern) {
 		pattern = slash(pattern);
 	}
 
+	if (pattern.endsWith('/')) {
+		pattern = pattern.slice(0, -1);
+	}
+
 	if (pattern.startsWith('./')) {
 		return pattern.slice(2);
 	}
diff --git a/test-tap/globs.js b/test-tap/globs.js
index 164ea7a1b..73db32d47 100644
--- a/test-tap/globs.js
+++ b/test-tap/globs.js
@@ -25,6 +25,12 @@ test('ignores relativeness in patterns', t => {
 	t.end();
 });
 
+test('ignores trailing slashes in (simple) patterns', t => {
+	const {filePatterns} = globs.normalizeGlobs({files: ['foo/', '!bar/', 'foo/{bar/,baz/}'], extensions: ['js'], providers: []});
+	t.same(filePatterns, ['foo', '!bar', 'foo/{bar/,baz/}']);
+	t.end();
+});
+
 test('isTest with defaults', t => {
 	const options = {
 		...globs.normalizeGlobs({