diff --git a/src/features/helper/configuration.ts b/src/features/helper/configuration.ts
index 6cad68c..4cef2e1 100644
--- a/src/features/helper/configuration.ts
+++ b/src/features/helper/configuration.ts
@@ -428,6 +428,9 @@ export default class Configuration {
     const fileName = editor ? Utilities.normalizePath(editor.document.fileName) : undefined;
 
     const vars: Variables = {
+      // - the path of the user's home folder
+      userHome: process.env.HOME || process.env.USERPROFILE,
+
       // - the path of the folder opened in VS Code
       workspaceFolder: rootPath,
 
diff --git a/src/features/helper/types/variables.ts b/src/features/helper/types/variables.ts
index 4f3cf8a..55ff7fd 100644
--- a/src/features/helper/types/variables.ts
+++ b/src/features/helper/types/variables.ts
@@ -1,4 +1,5 @@
 type Variables = {
+  userHome?: string;
   fileWorkspaceFolder?: string;
   workspaceFolder?: string;
   workspaceFolderBasename?: string;
diff --git a/src/features/helper/utilities.ts b/src/features/helper/utilities.ts
index aa373fa..d999216 100644
--- a/src/features/helper/utilities.ts
+++ b/src/features/helper/utilities.ts
@@ -14,7 +14,7 @@ export default class Utilities {
   }
 
   static interpolateString(command: string, variables: Variables): string {
-    const regex = /\$\{([^\}]+)\}/g; // eslint-disable-line no-useless-escape
+    const regex = /\$\{([^}]+)\}/g;
 
     const match = command.match(regex);
     while (match?.length) {
diff --git a/test/suite/extension.test.ts b/test/suite/extension.test.ts
index a8ed696..a4779cc 100644
--- a/test/suite/extension.test.ts
+++ b/test/suite/extension.test.ts
@@ -36,13 +36,10 @@ suite("Extension Test Suite", () => {
 
   test("Bad SQL has zero diagnostics after document format", async () => {
     const documentUri = Helper.getDocumentUri("/test_sql/format.sql");
-    const document = await Helper.activate(documentUri);
+    await Helper.activate(documentUri);
     const preFormatDiagnostics = vscode.languages.getDiagnostics(documentUri);
     assert.strictEqual(preFormatDiagnostics.length, 1, "Pre-format diagnostics not expected length");
-
     await Helper.format(documentUri);
-    await Helper.activate(documentUri);
-
     const postFormatDiagnostics = vscode.languages.getDiagnostics(documentUri);
     assert.strictEqual(postFormatDiagnostics.length, 0, "Post-format diagnostics not expected length");
 
diff --git a/test/suite/helper.ts b/test/suite/helper.ts
index 9a9fde1..4131652 100644
--- a/test/suite/helper.ts
+++ b/test/suite/helper.ts
@@ -1,7 +1,7 @@
 import * as assert from "assert";
 import * as vscode from "vscode";
 
-export const SLEEP_TIME = 10000;
+export const SLEEP_TIME = 2000;
 
 export const activate = async (documentUri: vscode.Uri): Promise<vscode.TextDocument | undefined> => {
     // The extensionId is `publisher.name` from package.json
@@ -13,9 +13,7 @@ export const activate = async (documentUri: vscode.Uri): Promise<vscode.TextDocu
         const document = await vscode.workspace.openTextDocument(documentUri);
         await vscode.window.showTextDocument(document);
         await document.save();
-
         await sleep(SLEEP_TIME); // Wait for server activation
-
         return document;
     } catch (e) {
         console.error(e);
@@ -28,11 +26,8 @@ export const format = async (documentUri: vscode.Uri) => {
         const document = await vscode.workspace.openTextDocument(documentUri);
         await vscode.window.showTextDocument(document);
         await vscode.commands.executeCommand("editor.action.formatDocument");
-        await sleep(SLEEP_TIME);
         await document.save();
-
         await sleep(SLEEP_TIME); // Wait for server activation
-
         return document;
     } catch (e) {
         console.error(e);
diff --git a/test/suite/utilities.test.ts b/test/suite/utilities.test.ts
new file mode 100644
index 0000000..81a9270
--- /dev/null
+++ b/test/suite/utilities.test.ts
@@ -0,0 +1,25 @@
+import * as assert from "assert";
+
+import Configuration from "../../src/features/helper/configuration";
+import Variables from "../../src/features/helper/types/variables";
+import Utilities from "../../src/features/helper/utilities";
+
+suite("Utilities Function Test Suite", () => {
+  const variables = Configuration.variables();
+  const variablesToCheck = [
+    "userHome",
+    "workspaceFolder",
+    "workspaceFolderBasename",
+    "execPath",
+  ];
+  variablesToCheck.forEach((variable) => {
+    test(`${variable} resolves in interpolation`, function () {
+      const interpolatedString = Utilities.interpolateString(
+        `\${${variable}}`,
+        variables,
+      );
+      const expectedValue = variables[variable as keyof Variables];
+      assert.strictEqual(interpolatedString, expectedValue);
+    });
+  });
+});