diff --git a/pytket/tests/classical_test.py b/pytket/tests/classical_test.py
index ceeda6b421..49a9203fb2 100644
--- a/pytket/tests/classical_test.py
+++ b/pytket/tests/classical_test.py
@@ -192,6 +192,18 @@ def test_wasm_3() -> None:
     assert c.depth() == 1
 
 
+def test_wasm_3_bytes() -> None:
+    with open("testfile.wasm", "rb") as f:
+        bytecode = f.read()
+    c = Circuit(0, 6)
+
+    w = wasm.WasmModuleHandler(bytecode)
+
+    c.add_wasm("add_one", w, [1], [1], [Bit(0), Bit(1)])
+
+    assert c.depth() == 1
+
+
 def test_wasm_4() -> None:
     w = wasm.WasmFileHandler("testfile.wasm")
 
@@ -412,6 +424,19 @@ def test_wasm_function_check_6() -> None:
     assert c.depth() == 1
 
 
+def test_wasm_function_check_6_bytes() -> None:
+    with open("testfile.wasm", "rb") as f:
+        bytecode = f.read()
+
+    w = wasm.WasmModuleHandler(bytecode)
+    c = Circuit(20, 20)
+    c0 = c.add_c_register("c0", 32)
+    c1 = c.add_c_register("c1", 4)
+
+    c.add_wasm_to_reg("add_one", w, [c0], [c1])
+    assert c.depth() == 1
+
+
 def test_wasm_function_check_7() -> None:
     w = wasm.WasmFileHandler("testfile.wasm", int_size=32)
     c = Circuit(20, 20)
@@ -566,7 +591,7 @@ def test_wasmfilehandler_repr() -> None:
 function 'no_return' with 1 i32 parameter(s) and 0 i32 return value(s)
 function 'no_parameters' with 0 i32 parameter(s) and 1 i32 return value(s)
 function 'new_function' with 0 i32 parameter(s) and 1 i32 return value(s)
-unsupported function with invalid parameter or result type: 'add_something' 
+unsupported function with invalid parameter or result type: 'add_something'
 """
     )
 
@@ -578,13 +603,13 @@ def test_wasmfilehandler_repr_64() -> None:
         == """Functions in wasm file with the uid 6a0a29e235cd5c60353254bc2b459e631d381cdd0bded7ae6cb44afb784bd2de:
 function 'init' with 0 i64 parameter(s) and 0 i64 return value(s)
 function 'add_something' with 1 i64 parameter(s) and 1 i64 return value(s)
-unsupported function with invalid parameter or result type: 'add_one' 
-unsupported function with invalid parameter or result type: 'multi' 
-unsupported function with invalid parameter or result type: 'add_two' 
-unsupported function with invalid parameter or result type: 'add_eleven' 
-unsupported function with invalid parameter or result type: 'no_return' 
-unsupported function with invalid parameter or result type: 'no_parameters' 
-unsupported function with invalid parameter or result type: 'new_function' 
+unsupported function with invalid parameter or result type: 'add_one'
+unsupported function with invalid parameter or result type: 'multi'
+unsupported function with invalid parameter or result type: 'add_two'
+unsupported function with invalid parameter or result type: 'add_eleven'
+unsupported function with invalid parameter or result type: 'no_return'
+unsupported function with invalid parameter or result type: 'no_parameters'
+unsupported function with invalid parameter or result type: 'new_function'
 """
     )
 
@@ -607,7 +632,7 @@ def test_wasmfilehandler_repr_2() -> None:
 function 'mixed_up_2' with 2 i32 parameter(s) and 1 i32 return value(s)
 function 'mixed_up_3' with 3 i32 parameter(s) and 1 i32 return value(s)
 function 'unse_internal' with 1 i32 parameter(s) and 1 i32 return value(s)
-unsupported function with invalid parameter or result type: 'add_something' 
+unsupported function with invalid parameter or result type: 'add_something'
 """
     )
 
@@ -619,18 +644,18 @@ def test_wasmfilehandler_repr_64_2() -> None:
         == """Functions in wasm file with the uid 360e60c3b092ad735982ba49207f9c3250b111e5963fb630c69f85266172080b:
 function 'init' with 0 i64 parameter(s) and 0 i64 return value(s)
 function 'add_something' with 1 i64 parameter(s) and 1 i64 return value(s)
-unsupported function with invalid parameter or result type: 'add_one' 
-unsupported function with invalid parameter or result type: 'multi' 
-unsupported function with invalid parameter or result type: 'add_two' 
-unsupported function with invalid parameter or result type: 'add_something_32' 
-unsupported function with invalid parameter or result type: 'add_eleven' 
-unsupported function with invalid parameter or result type: 'no_return' 
-unsupported function with invalid parameter or result type: 'no_parameters' 
-unsupported function with invalid parameter or result type: 'new_function' 
-unsupported function with invalid parameter or result type: 'mixed_up' 
-unsupported function with invalid parameter or result type: 'mixed_up_2' 
-unsupported function with invalid parameter or result type: 'mixed_up_3' 
-unsupported function with invalid parameter or result type: 'unse_internal' 
+unsupported function with invalid parameter or result type: 'add_one'
+unsupported function with invalid parameter or result type: 'multi'
+unsupported function with invalid parameter or result type: 'add_two'
+unsupported function with invalid parameter or result type: 'add_something_32'
+unsupported function with invalid parameter or result type: 'add_eleven'
+unsupported function with invalid parameter or result type: 'no_return'
+unsupported function with invalid parameter or result type: 'no_parameters'
+unsupported function with invalid parameter or result type: 'new_function'
+unsupported function with invalid parameter or result type: 'mixed_up'
+unsupported function with invalid parameter or result type: 'mixed_up_2'
+unsupported function with invalid parameter or result type: 'mixed_up_3'
+unsupported function with invalid parameter or result type: 'unse_internal'
 """
     )
 
@@ -658,7 +683,7 @@ def test_wasmfilehandler_multivalue_clang() -> None:
         == """Functions in wasm file with the uid 6f821422038eec251d2f4e6bf2b9a5717b18b5c96a8a8e01fb49f080d9610f6e:
 function '__wasm_call_ctors' with 0 i32 parameter(s) and 0 i32 return value(s)
 function 'init' with 0 i32 parameter(s) and 0 i32 return value(s)
-unsupported function with invalid parameter or result type: 'divmod' 
+unsupported function with invalid parameter or result type: 'divmod'
 """
     )