diff --git a/tests/invalid_function_name_intrinsic.qbl b/tests/invalid_function_name_intrinsic.qbl
new file mode 100644
index 0000000..69807a4
--- /dev/null
+++ b/tests/invalid_function_name_intrinsic.qbl
@@ -0,0 +1,8 @@
+//invalid,Function name print at 1:22 is already an intrinsic
+
+function int => print
+{
+	deq
+}
+
+42 print
\ No newline at end of file
diff --git a/tests/invalid_function_name_operation.qbl b/tests/invalid_function_name_operation.qbl
new file mode 100644
index 0000000..3fa6d83
--- /dev/null
+++ b/tests/invalid_function_name_operation.qbl
@@ -0,0 +1,8 @@
+//invalid,Expected function name but got deq at 3:20
+
+function int => deq
+{
+	deq
+}
+
+42 print
\ No newline at end of file
diff --git a/tests/missing_function_name.qbl b/tests/missing_function_name.qbl
new file mode 100644
index 0000000..b832e04
--- /dev/null
+++ b/tests/missing_function_name.qbl
@@ -0,0 +1,6 @@
+//invalid,Expected function name but got { at 2:2
+
+function int =>
+{
+	deq
+}
\ No newline at end of file
diff --git a/test.qbl b/tests/test.qbl
similarity index 80%
rename from test.qbl
rename to tests/test.qbl
index e3af7ef..c2db338 100644
--- a/test.qbl
+++ b/tests/test.qbl
@@ -1,3 +1,6 @@
+//valid
+//output: Hello, World!\n4242test2Falsetesttesttest
+
 "Hello, World!\n" print 43 foo foo deq
 
 
@@ -33,4 +36,4 @@ function int => whileFunction
 	deq
 }
 
-42 whileFunction
\ No newline at end of file
+3 whileFunction
\ No newline at end of file
diff --git a/tests/typecheck_function_multiple_io.qbl b/tests/typecheck_function_multiple_io.qbl
new file mode 100644
index 0000000..9ae2695
--- /dev/null
+++ b/tests/typecheck_function_multiple_io.qbl
@@ -0,0 +1,8 @@
+//valid,output:42footesttest2stuff
+
+function int str any => str str str foo
+{
+	print req deq "test" "test2" "stuff" print
+}
+
+42 "foo" "bar" foo print print print
\ No newline at end of file
diff --git a/tests/unknown_function_basic.qbl b/tests/unknown_function_basic.qbl
new file mode 100644
index 0000000..6ea98f6
--- /dev/null
+++ b/tests/unknown_function_basic.qbl
@@ -0,0 +1,2 @@
+//invalid,Call to unknown function foo at 1:4
+foo
\ No newline at end of file
diff --git a/tests/unknown_function_hard.qbl b/tests/unknown_function_hard.qbl
new file mode 100644
index 0000000..c30c165
--- /dev/null
+++ b/tests/unknown_function_hard.qbl
@@ -0,0 +1,19 @@
+//invalid,Call to unknown function bar at 7:7
+
+function int => foo
+{
+	while
+	{
+		if
+		{
+			bar
+		}
+		else
+		{
+			1 -
+		}
+	}
+	deq
+}
+
+42 foo
\ No newline at end of file
diff --git a/tests/unknown_function_in_function.qbl b/tests/unknown_function_in_function.qbl
new file mode 100644
index 0000000..cbb7e94
--- /dev/null
+++ b/tests/unknown_function_in_function.qbl
@@ -0,0 +1,8 @@
+//invalid,Call to unknown function bar at 3:5
+
+function => foo
+{
+	bar
+}
+
+foo
\ No newline at end of file