diff --git a/src/lib/make-toolbox-xml.js b/src/lib/make-toolbox-xml.js
index 245c918e51e99de0991e05868741c24263d912e0..92748b20f61af930ede35531be858ead618d5b16 100644
--- a/src/lib/make-toolbox-xml.js
+++ b/src/lib/make-toolbox-xml.js
@@ -589,7 +589,7 @@ const operators = function () {
         <block type="operator_join">
             <value name="STRING1">
                 <shadow type="text">
-                    <field name="TEXT">${apple}</field>
+                    <field name="TEXT">${apple} </field>
                 </shadow>
             </value>
             <value name="STRING2">
diff --git a/test/integration/blocks.test.js b/test/integration/blocks.test.js
index 8c4e1a6037bb57d08947c0a45e1bb407a28b4ea9..6ca2d279cf6f36bf1cbf75edd012c35abde70d03 100644
--- a/test/integration/blocks.test.js
+++ b/test/integration/blocks.test.js
@@ -34,7 +34,7 @@ describe('Working with the blocks', () => {
         await clickText('Operators', scope.blocksTab);
         await new Promise(resolve => setTimeout(resolve, 1000)); // Wait for scroll animation
         await clickText('join', scope.blocksTab); // Click "join <hello> <world>" block
-        await findByText('applebanana', scope.reportedValue); // Tooltip with result
+        await findByText('apple banana', scope.reportedValue); // Tooltip with result
         const logs = await getLogs();
         await expect(logs).toEqual([]);
     });