diff --git a/src/test/adapter.ts b/src/test/adapter.ts
index 7d0decfe..1b506aac 100644
--- a/src/test/adapter.ts
+++ b/src/test/adapter.ts
@@ -849,7 +849,7 @@ describe('PHP Debug Adapter', () => {
                 {
                     context: 'clipboard',
                     expression: '$anArray',
-                    result: 'array (\n  0 => 1,\n  test => 2,\n  test2 => \n  array (\n    t => 123,\n  ),\n)',
+                    result: "array (\n  0 => 1,\n  'test' => 2,\n  'test2' => \n  array (\n    't' => 123,\n  ),\n)",
                     hasVariablesReference: false,
                 },
                 { context: 'clipboard', expression: '$aBoolean', result: 'true', hasVariablesReference: false },
diff --git a/src/varExport.ts b/src/varExport.ts
index 2632ce2b..421037b7 100644
--- a/src/varExport.ts
+++ b/src/varExport.ts
@@ -22,14 +22,12 @@ export async function varExportProperty(property: xdebug.Property, indent: strin
         displayValue = (
             await Promise.all(
                 properties.map(async property => {
+                    const name = /^-?[0-9]+$/.test(property.name) ? `${property.name}` : `'${property.name}'`
                     const indent2 = indent + '  '
                     if (property.hasChildren) {
-                        return `${indent2}${property.name} => \n${indent2}${await varExportProperty(
-                            property,
-                            indent2
-                        )},`
+                        return `${indent2}${name} => \n${indent2}${await varExportProperty(property, indent2)},`
                     } else {
-                        return `${indent2}${property.name} => ${await varExportProperty(property, indent2)},`
+                        return `${indent2}${name} => ${await varExportProperty(property, indent2)},`
                     }
                 })
             )