diff --git a/extensions/vscode-api-tests/package.json b/extensions/vscode-api-tests/package.json
index 2353d3fcf9b..b305d960895 100644
--- a/extensions/vscode-api-tests/package.json
+++ b/extensions/vscode-api-tests/package.json
@@ -23,6 +23,9 @@
 				"farboo.nested.config2": {
 					"type": "string",
 					"default": "Das Pferd frisst kein Reis."
+				},
+				"farboo.config4": {
+					"type": "string"
 				}
 			}
 		}
diff --git a/extensions/vscode-api-tests/src/workspace.test.ts b/extensions/vscode-api-tests/src/workspace.test.ts
index f5ef7c24c5e..972ad2ebf29 100644
--- a/extensions/vscode-api-tests/src/workspace.test.ts
+++ b/extensions/vscode-api-tests/src/workspace.test.ts
@@ -20,6 +20,8 @@ suite('workspace-namespace', () => {
 
 		assert.ok(config.has('config0'));
 		assert.equal(config.get('config0'), true);
+		assert.equal(config.get('config4'), '');
+
 		assert.ok(config.has('nested.config1'));
 		assert.equal(config.get('nested.config1'), 42);
 		assert.ok(config.has('nested.config2'));