diff --git a/tests/FilesT.cpp b/tests/FilesT.cpp
index 9a994202..c8cd6c03 100644
--- a/tests/FilesT.cpp
+++ b/tests/FilesT.cpp
@@ -400,6 +400,7 @@ TEST_CASE("[Files] Off by with different delays")
 {
     sfz::Synth synth;
     synth.setSamplesPerBlock(256);
+    sfz::AudioBuffer<float> buffer(2, 256);
     synth.loadSfzFile(fs::current_path() / "tests/TestFiles/off_by.sfz");
     REQUIRE( synth.getNumRegions() == 4 );
     synth.noteOn(0, 63, 63);
@@ -408,6 +409,7 @@ TEST_CASE("[Files] Off by with different delays")
     REQUIRE( group1Voice->getRegion()->group == 1ul );
     REQUIRE( group1Voice->getRegion()->offBy == 2ul );
     synth.noteOn(100, 64, 63);
+    synth.renderBlock(buffer);
     REQUIRE( group1Voice->canBeStolen() );
 }