diff --git a/tests/ableton-hybrid.test.ts b/tests/ableton-hybrid.test.ts
index e607900..5cc0d44 100644
--- a/tests/ableton-hybrid.test.ts
+++ b/tests/ableton-hybrid.test.ts
@@ -232,6 +232,8 @@ test('serializes nested Live 10 Simplers without artificial empty Session clips'
     const rackTags = [...xml.matchAll(/<DrumGroupDevice\b[\s\S]*?<\/DrumGroupDevice>/g)].map(
       (match) => match[0],
     );
+    const expectedAttack = (200 / 255) * 1000;
+    const expectedRelease = (20 / 255) * 1000;
 
     assert.ok(simplerTags.length > 0);
     assert.ok(simplerTags.every((tag) => /\sId="\d+"/.test(tag)));
@@ -248,12 +250,16 @@ test('serializes nested Live 10 Simplers without artificial empty Session clips'
     );
     assert.ok(
       simplerBlocks.every((simpler) =>
-        /<Envelope>[\s\S]*?<AttackTime>[\s\S]*?<Manual Value="0.1"\s*\/>/.test(simpler),
+        new RegExp(
+          `<Envelope>[\\s\\S]*?<AttackTime>[\\s\\S]*?<Manual Value="${expectedAttack}"\\s*\\/>`,
+        ).test(simpler),
       ),
     );
     assert.ok(
       simplerBlocks.every((simpler) =>
-        /<Envelope>[\s\S]*?<ReleaseTime>[\s\S]*?<Manual Value="50"\s*\/>/.test(simpler),
+        new RegExp(
+          `<Envelope>[\\s\\S]*?<ReleaseTime>[\\s\\S]*?<Manual Value="${expectedRelease}"\\s*\\/>`,
+        ).test(simpler),
       ),
     );
     assert.ok(rackTags.length > 0);
@@ -266,6 +272,7 @@ test('serializes nested Live 10 Simplers without artificial empty Session clips'
     assert.doesNotMatch(xml, /<ReturnBranch\s/);
     assert.doesNotMatch(xml, /<AudioBranchSendInfo\s/);
     assert.doesNotMatch(xml, /Big Break Kit/);
+    assert.doesNotMatch(xml, /<ClipEnvelope\b/);
   } finally {
     await server.close();
   }