diff --git a/tests/SynthT.cpp b/tests/SynthT.cpp
index 072206c0..822f1d0a 100644
--- a/tests/SynthT.cpp
+++ b/tests/SynthT.cpp
@@ -13,7 +13,7 @@ constexpr int blockSize { 256 };
 TEST_CASE("[Synth] Play and check active voices")
 {
     sfz::Synth synth;
-    synth.setSamplesPerBlock(256);
+    synth.setSamplesPerBlock(blockSize);
     sfz::AudioBuffer<float> buffer { 2, blockSize };
     synth.loadSfzFile(fs::current_path() / "tests/TestFiles/groups_avl.sfz");
 
@@ -29,7 +29,7 @@ TEST_CASE("[Synth] Play and check active voices")
 TEST_CASE("[Synth] Change the number of voice while playing")
 {
     sfz::Synth synth;
-    synth.setSamplesPerBlock(256);
+    synth.setSamplesPerBlock(blockSize);
     sfz::AudioBuffer<float> buffer { 2, blockSize };
     synth.loadSfzFile(fs::current_path() / "tests/TestFiles/groups_avl.sfz");
 
@@ -210,3 +210,52 @@ TEST_CASE("[Synth] Trigger=release_key and an envelope properly kills the voice
         synth.renderBlock(buffer);
     REQUIRE( synth.getVoiceView(0)->isFree() );
 }
+
+TEST_CASE("[Synth] Number of effect buses and resetting behavior")
+{
+    sfz::Synth synth;
+    synth.setSamplesPerBlock(blockSize);
+    sfz::AudioBuffer<float> buffer { 2, blockSize };
+
+    REQUIRE( synth.getEffectBusView(0) == nullptr); // No effects at first
+    synth.loadSfzFile(fs::current_path() / "tests/TestFiles/Effects/base.sfz");
+    REQUIRE( synth.getEffectBusView(0) != nullptr); // We have a main bus
+    // Check that we can render blocks
+    for (int i = 0; i < 100; ++i)
+        synth.renderBlock(buffer);
+
+    synth.loadSfzFile(fs::current_path() / "tests/TestFiles/Effects/bitcrusher_2.sfz");
+    REQUIRE( synth.getEffectBusView(0) != nullptr); // We have a main bus
+    REQUIRE( synth.getEffectBusView(1) != nullptr); // and an FX bus
+    // Check that we can render blocks
+    for (int i = 0; i < 100; ++i)
+        synth.renderBlock(buffer);
+
+    synth.loadSfzFile(fs::current_path() / "tests/TestFiles/Effects/base.sfz");
+    REQUIRE( synth.getEffectBusView(0) != nullptr); // We have a main bus
+    REQUIRE( synth.getEffectBusView(1) == nullptr); // and no FX bus
+    // Check that we can render blocks
+    for (int i = 0; i < 100; ++i)
+        synth.renderBlock(buffer);
+
+    synth.loadSfzFile(fs::current_path() / "tests/TestFiles/Effects/bitcrusher_3.sfz");
+    REQUIRE( synth.getEffectBusView(0) != nullptr); // We have a main bus
+    REQUIRE( synth.getEffectBusView(1) == nullptr); // empty/uninitialized fx bus
+    REQUIRE( synth.getEffectBusView(2) == nullptr); // empty/uninitialized fx bus
+    REQUIRE( synth.getEffectBusView(3) != nullptr); // and an FX bus (because we built up to fx3)
+    REQUIRE( synth.getEffectBusView(3)->numEffects() == 1);
+    // Check that we can render blocks
+    for (int i = 0; i < 100; ++i)
+        synth.renderBlock(buffer);
+}
+
+TEST_CASE("[Synth] No effect in the main bus")
+{
+    sfz::Synth synth;
+    synth.loadSfzFile(fs::current_path() / "tests/TestFiles/Effects/base.sfz");
+    auto bus = synth.getEffectBusView(0);
+    REQUIRE( bus != nullptr); // We have a main bus
+    REQUIRE( bus->numEffects() == 0 );
+    REQUIRE( bus->gainToMain() == 1 );
+    REQUIRE( bus->gainToMix() == 0 );
+}
diff --git a/tests/TestFiles/Effects/base.sfz b/tests/TestFiles/Effects/base.sfz
new file mode 100644
index 00000000..07b3874d
--- /dev/null
+++ b/tests/TestFiles/Effects/base.sfz
@@ -0,0 +1,4 @@
+<region>
+lokey=0
+hikey=127
+sample=*sine
diff --git a/tests/TestFiles/Effects/bitcrusher_1.sfz b/tests/TestFiles/Effects/bitcrusher_1.sfz
new file mode 100644
index 00000000..dd28c5c4
--- /dev/null
+++ b/tests/TestFiles/Effects/bitcrusher_1.sfz
@@ -0,0 +1,9 @@
+<region>
+lokey=0
+hikey=127
+sample=*sine
+
+<effect>
+type=lofi
+bitred=90
+decim=10
diff --git a/tests/TestFiles/Effects/bitcrusher_2.sfz b/tests/TestFiles/Effects/bitcrusher_2.sfz
new file mode 100644
index 00000000..a0544f26
--- /dev/null
+++ b/tests/TestFiles/Effects/bitcrusher_2.sfz
@@ -0,0 +1,13 @@
+<region>
+lokey=0
+hikey=127
+sample=*sine
+effect1=100
+
+<effect>
+directtomain=50
+fx1tomain=50
+type=lofi
+bus=fx1
+bitred=90
+decim=10
diff --git a/tests/TestFiles/Effects/bitcrusher_3.sfz b/tests/TestFiles/Effects/bitcrusher_3.sfz
new file mode 100644
index 00000000..51585e31
--- /dev/null
+++ b/tests/TestFiles/Effects/bitcrusher_3.sfz
@@ -0,0 +1,13 @@
+<region>
+lokey=0
+hikey=127
+sample=*sine
+effect1=100
+
+<effect>
+directtomain=50
+fx3tomain=50
+type=lofi
+bus=fx3
+bitred=90
+decim=10