diff --git a/test/FluidBufToKr test.scd b/test/FluidBufToKr test.scd
index e3c2c01..4e93e11 100644
--- a/test/FluidBufToKr test.scd	
+++ b/test/FluidBufToKr test.scd	
@@ -94,8 +94,7 @@ s.waitForBoot{
 
 (
 // FluidBufToKr
-// 100 is fine
-/// 1000 is fine
+
 s.waitForBoot{
 	Routine{
 		var buf = Buffer.loadCollection(s,Array.fill(1001,{arg i; i}));
@@ -112,8 +111,7 @@ s.waitForBoot{
 
 (
 // FluidBufToKr
-// 100 is fine
-/// 1000 is fine
+// This should throw an error because this sound file buffer is longer than 1000 samples
 s.waitForBoot{
 	Routine{
 		var buf = Buffer.read(s,"/Users/macprocomputer/Desktop/_flucoma/code/flucoma-core-src/AudioFiles/Harker-DS-TenOboeMultiphonics-M.wav");
@@ -130,8 +128,7 @@ s.waitForBoot{
 
 (
 // FluidKrToBuf test with super long buffer
-// 100 is fine
-// 1000 is fine
+// This should throw an error because this sound file buffer is longer than 1000 samples
 s.waitForBoot{
 	Routine{
 		// var buf = Buffer.alloc(s,1000);
@@ -151,3 +148,63 @@ s.waitForBoot{
 }
 )
 
+// ===================== pass a buffer to a running synth =======================
+(
+s.waitForBoot{
+	Routine{
+		~synth = {
+			arg buf;
+			FluidBufToKr.kr(buf,5).poll;
+		}.play;
+
+		2.wait;
+
+		"make buffer".postln;
+		~buffer = Buffer.alloc(s,5);
+		s.sync;
+		~buffer.setn(0,Array.fill(5,{rrand(0,100)}));
+		s.sync;
+		~synth.set(\buf,~buffer);
+	}.play;
+};
+)
+
+(
+// throws error because number of frames not specified
+s.waitForBoot{
+	Routine{
+		~synth = {
+			arg buf;
+			FluidKrToBuf.kr(SinOsc.kr(Array.fill(5,{rrand(0.0,1.0)})),buf);
+
+			FluidBufToKr.kr(buf).poll;
+		}.play;
+
+		2.wait;
+
+		~buffer = Buffer.alloc(s,5);
+		s.sync;
+		~synth.set(\buf,~buffer);
+	}.play;
+};
+)
+
+(
+// works
+s.waitForBoot{
+	Routine{
+		~synth = {
+			arg buf;
+			FluidKrToBuf.kr(SinOsc.kr(Array.fill(5,{rrand(0.0,1.0)})),buf);
+
+			FluidBufToKr.kr(buf,5).poll;
+		}.play;
+
+		2.wait;
+
+		~buffer = Buffer.alloc(s,5);
+		s.sync;
+		~synth.set(\buf,~buffer);
+	}.play;
+};
+)
\ No newline at end of file