diff --git a/news/3 Code Health/3988.md b/news/3 Code Health/3988.md
new file mode 100644
index 000000000000..f8e0520d36b8
--- /dev/null
+++ b/news/3 Code Health/3988.md	
@@ -0,0 +1 @@
+Move `splitParent` from `string.ts` into tests folder.
diff --git a/src/client/common/utils/string.ts b/src/client/common/utils/string.ts
deleted file mode 100644
index 00f2e014253e..000000000000
--- a/src/client/common/utils/string.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// Licensed under the MIT License.
-
-'use strict';
-
-/**
- * Return [parent name, name] for the given qualified (dotted) name.
- *
- * Examples:
- *  'x.y'   -> ['x', 'y']
- *  'x'     -> ['', 'x']
- *  'x.y.z' -> ['x.y', 'z']
- *  ''      -> ['', '']
- */
-export function splitParent(fullName: string): [string, string] {
-    if (fullName.length === 0) {
-        return ['', ''];
-    }
-    const pos = fullName.lastIndexOf('.');
-    if (pos < 0) {
-        return ['', fullName];
-    }
-    const parentName = fullName.slice(0, pos);
-    const name = fullName.slice(pos + 1);
-    return [parentName, name];
-}
diff --git a/src/test/common/utils/string.unit.test.ts b/src/test/common/utils/string.unit.test.ts
deleted file mode 100644
index da0347330cef..000000000000
--- a/src/test/common/utils/string.unit.test.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// Licensed under the MIT License.
-
-'use strict';
-
-// tslint:disable:max-func-body-length no-any no-require-imports no-var-requires
-
-import { expect } from 'chai';
-import { splitParent } from '../../../client/common/utils/string';
-
-suite('splitParent()', () => {
-    test('valid values', async () => {
-        const tests: [string, [string, string]][] = [
-            ['x.y', ['x', 'y']],
-            ['x', ['', 'x']],
-            ['x.y.z', ['x.y', 'z']],
-            ['', ['', '']]
-        ];
-        for (const [raw, expected] of tests) {
-            const result = splitParent(raw);
-
-            expect(result).to.deep.equal(expected);
-        }
-    });
-});
diff --git a/src/test/languageServers/jedi/symbolProvider.unit.test.ts b/src/test/languageServers/jedi/symbolProvider.unit.test.ts
index 768b30959028..d48c10e7376a 100644
--- a/src/test/languageServers/jedi/symbolProvider.unit.test.ts
+++ b/src/test/languageServers/jedi/symbolProvider.unit.test.ts
@@ -14,7 +14,6 @@ import {
 } from 'vscode';
 import { LanguageClient } from 'vscode-languageclient';
 import { IFileSystem } from '../../../client/common/platform/types';
-import { splitParent } from '../../../client/common/utils/string';
 import { parseRange } from '../../../client/common/utils/text';
 import { IServiceContainer } from '../../../client/ioc/types';
 import { JediFactory } from '../../../client/languageServices/jediProxyFactory';
@@ -462,3 +461,25 @@ function normalizeSymbols(uri: Uri, raw: any[]): SymbolInformation[] {
     }
     return symbols;
 }
+
+/**
+ * Return [parent name, name] for the given qualified (dotted) name.
+ *
+ * Examples:
+ *  'x.y'   -> ['x', 'y']
+ *  'x'     -> ['', 'x']
+ *  'x.y.z' -> ['x.y', 'z']
+ *  ''      -> ['', '']
+ */
+export function splitParent(fullName: string): [string, string] {
+    if (fullName.length === 0) {
+        return ['', ''];
+    }
+    const pos = fullName.lastIndexOf('.');
+    if (pos < 0) {
+        return ['', fullName];
+    }
+    const parentName = fullName.slice(0, pos);
+    const name = fullName.slice(pos + 1);
+    return [parentName, name];
+}