diff --git a/tests/RegionT.cpp b/tests/RegionT.cpp
index aa86f52b..71063e74 100644
--- a/tests/RegionT.cpp
+++ b/tests/RegionT.cpp
@@ -1350,6 +1350,23 @@ TEST_CASE("[Region] Parsing opcodes")
         region.parseOpcode({ "eq1_freqcc15", "50000" });
         REQUIRE(region.equalizers[0].frequencyCC[15] == 30000.0f);
     }
+
+    SECTION("Effects send")
+    {
+        REQUIRE(region.gainToEffect.size() == 1);
+        REQUIRE(region.gainToEffect[0] == 1.0f);
+        region.parseOpcode({ "effect1", "50.4" });
+        REQUIRE(region.gainToEffect.size() == 2);
+        REQUIRE(region.gainToEffect[1] == 0.504f);
+        region.parseOpcode({ "effect3", "100" });
+        REQUIRE(region.gainToEffect.size() == 4);
+        REQUIRE(region.gainToEffect[2] == 0.0f);
+        REQUIRE(region.gainToEffect[3] == 1.0f);
+        region.parseOpcode({ "effect3", "150.1" });
+        REQUIRE(region.gainToEffect[3] == 1.0f);
+        region.parseOpcode({ "effect3", "-50.65" });
+        REQUIRE(region.gainToEffect[3] == 0.0f);
+    }
 }
 
 // Specific region bugs
diff --git a/tests/TestFiles/Effects/to_mix.sfz b/tests/TestFiles/Effects/to_mix.sfz
index 8f12e70e..65cd1837 100644
--- a/tests/TestFiles/Effects/to_mix.sfz
+++ b/tests/TestFiles/Effects/to_mix.sfz
@@ -2,6 +2,7 @@
 lokey=0
 hikey=127
 sample=*sine
+effect1=100
 
 <effect>
 fx1tomix=50