diff --git a/tests/programs/bitwise-and.q b/tests/programs/bitwise-and.q
index fda2dcc..34df541 100644
--- a/tests/programs/bitwise-and.q
+++ b/tests/programs/bitwise-and.q
@@ -1,61 +1,16 @@
-import sys
-
 main() {
-	if 0 & 0 != 0 {
-		sys.exit(1)
-	}
-
-	if 0 & 1 != 0 {
-		sys.exit(2)
-	}
-
-	if 1 & 0 != 0 {
-		sys.exit(3)
-	}
-
-	if 1 & 1 != 1 {
-		sys.exit(4)
-	}
-
-	if 1 & 2 != 0 {
-		sys.exit(5)
-	}
-
-	if 1 & 3 != 1 {
-		sys.exit(6)
-	}
-
-	if 2 & 0 != 0 {
-		sys.exit(7)
-	}
-
-	if 2 & 1 != 0 {
-		sys.exit(8)
-	}
-
-	if 2 & 2 != 2 {
-		sys.exit(9)
-	}
-
-	if 2 & 3 != 2 {
-		sys.exit(10)
-	}
-
-	if 3 & 0 != 0 {
-		sys.exit(11)
-	}
-
-	if 3 & 1 != 1 {
-		sys.exit(12)
-	}
-
-	if 3 & 2 != 2 {
-		sys.exit(13)
-	}
-
-	if 3 & 3 != 3 {
-		sys.exit(14)
-	}
-
-	sys.exit(0)
+	assert 0 & 0 == 0
+	assert 0 & 1 == 0
+	assert 1 & 0 == 0
+	assert 1 & 1 == 1
+	assert 1 & 2 == 0
+	assert 1 & 3 == 1
+	assert 2 & 0 == 0
+	assert 2 & 1 == 0
+	assert 2 & 2 == 2
+	assert 2 & 3 == 2
+	assert 3 & 0 == 0
+	assert 3 & 1 == 1
+	assert 3 & 2 == 2
+	assert 3 & 3 == 3
 }
\ No newline at end of file
diff --git a/tests/programs/bitwise-or.q b/tests/programs/bitwise-or.q
index 6ea338f..12de2d2 100644
--- a/tests/programs/bitwise-or.q
+++ b/tests/programs/bitwise-or.q
@@ -1,61 +1,16 @@
-import sys
-
 main() {
-	if 0 | 0 != 0 {
-		sys.exit(1)
-	}
-
-	if 0 | 1 != 1 {
-		sys.exit(2)
-	}
-
-	if 1 | 0 != 1 {
-		sys.exit(3)
-	}
-
-	if 1 | 1 != 1 {
-		sys.exit(4)
-	}
-
-	if 1 | 2 != 3 {
-		sys.exit(5)
-	}
-
-	if 1 | 3 != 3 {
-		sys.exit(6)
-	}
-
-	if 2 | 0 != 2 {
-		sys.exit(7)
-	}
-
-	if 2 | 1 != 3 {
-		sys.exit(8)
-	}
-
-	if 2 | 2 != 2 {
-		sys.exit(9)
-	}
-
-	if 2 | 3 != 3 {
-		sys.exit(10)
-	}
-
-	if 3 | 0 != 3 {
-		sys.exit(11)
-	}
-
-	if 3 | 1 != 3 {
-		sys.exit(12)
-	}
-
-	if 3 | 2 != 3 {
-		sys.exit(13)
-	}
-
-	if 3 | 3 != 3 {
-		sys.exit(14)
-	}
-
-	sys.exit(0)
+	assert 0 | 0 == 0
+	assert 0 | 1 == 1
+	assert 1 | 0 == 1
+	assert 1 | 1 == 1
+	assert 1 | 2 == 3
+	assert 1 | 3 == 3
+	assert 2 | 0 == 2
+	assert 2 | 1 == 3
+	assert 2 | 2 == 2
+	assert 2 | 3 == 3
+	assert 3 | 0 == 3
+	assert 3 | 1 == 3
+	assert 3 | 2 == 3
+	assert 3 | 3 == 3
 }
\ No newline at end of file
diff --git a/tests/programs/bitwise-xor.q b/tests/programs/bitwise-xor.q
index f648051..e18f5e8 100644
--- a/tests/programs/bitwise-xor.q
+++ b/tests/programs/bitwise-xor.q
@@ -1,61 +1,16 @@
-import sys
-
 main() {
-	if 0 ^ 0 != 0 {
-		sys.exit(1)
-	}
-
-	if 0 ^ 1 != 1 {
-		sys.exit(2)
-	}
-
-	if 1 ^ 0 != 1 {
-		sys.exit(3)
-	}
-
-	if 1 ^ 1 != 0 {
-		sys.exit(4)
-	}
-
-	if 1 ^ 2 != 3 {
-		sys.exit(5)
-	}
-
-	if 1 ^ 3 != 2 {
-		sys.exit(6)
-	}
-
-	if 2 ^ 0 != 2 {
-		sys.exit(7)
-	}
-
-	if 2 ^ 1 != 3 {
-		sys.exit(8)
-	}
-
-	if 2 ^ 2 != 0 {
-		sys.exit(9)
-	}
-
-	if 2 ^ 3 != 1 {
-		sys.exit(10)
-	}
-
-	if 3 ^ 0 != 3 {
-		sys.exit(11)
-	}
-
-	if 3 ^ 1 != 2 {
-		sys.exit(12)
-	}
-
-	if 3 ^ 2 != 1 {
-		sys.exit(13)
-	}
-
-	if 3 ^ 3 != 0 {
-		sys.exit(14)
-	}
-
-	sys.exit(0)
+	assert 0 ^ 0 == 0
+	assert 0 ^ 1 == 1
+	assert 1 ^ 0 == 1
+	assert 1 ^ 1 == 0
+	assert 1 ^ 2 == 3
+	assert 1 ^ 3 == 2
+	assert 2 ^ 0 == 2
+	assert 2 ^ 1 == 3
+	assert 2 ^ 2 == 0
+	assert 2 ^ 3 == 1
+	assert 3 ^ 0 == 3
+	assert 3 ^ 1 == 2
+	assert 3 ^ 2 == 1
+	assert 3 ^ 3 == 0
 }
\ No newline at end of file
diff --git a/tests/programs/chained-calls.q b/tests/programs/chained-calls.q
index 49ddb84..e62a02e 100644
--- a/tests/programs/chained-calls.q
+++ b/tests/programs/chained-calls.q
@@ -1,7 +1,5 @@
-import sys
-
 main() {
-	sys.exit(f(1) + f(2) + f(3))
+	assert f(1) + f(2) + f(3) == 9
 }
 
 f(x) {
diff --git a/tests/programs/math.q b/tests/programs/math.q
index b3bb8ee..6fd1712 100644
--- a/tests/programs/math.q
+++ b/tests/programs/math.q
@@ -1,6 +1,7 @@
 main() {
 	x := 1000
-	syscall(60, div10(x) / 10 + div(x, 100) * 4 - 40 - x + x)
+	result := div10(x) / 10 + div(x, 100) * 4 - 40 - x + x
+	assert result == 10
 }
 
 div(x, y) {
diff --git a/tests/programs/nested-calls.q b/tests/programs/nested-calls.q
index f226bcb..a23e15c 100644
--- a/tests/programs/nested-calls.q
+++ b/tests/programs/nested-calls.q
@@ -1,7 +1,5 @@
-import sys
-
 main() {
-	sys.exit(f(f(f(1))))
+	assert f(f(f(1))) == 4
 }
 
 f(x) {
diff --git a/tests/programs/param-multi.q b/tests/programs/param-multi.q
index 97d7ec7..1267e94 100644
--- a/tests/programs/param-multi.q
+++ b/tests/programs/param-multi.q
@@ -1,5 +1,5 @@
 main() {
-	syscall(60, f(1, 2, 3))
+	assert f(1, 2, 3) == 21
 }
 
 f(x, y, z) {
diff --git a/tests/programs/param.q b/tests/programs/param.q
index bac5204..11ee501 100644
--- a/tests/programs/param.q
+++ b/tests/programs/param.q
@@ -1,5 +1,5 @@
 main() {
-	syscall(60, f(1))
+	assert f(1) == 3
 }
 
 f(x) {
diff --git a/tests/programs/precedence.q b/tests/programs/precedence.q
index bfb4fd2..c8ea775 100644
--- a/tests/programs/precedence.q
+++ b/tests/programs/precedence.q
@@ -1,5 +1,6 @@
 main() {
 	x := 2
 	y := 3
-	syscall(60, (x + y + (x + y) * (x + y)) / x / y + x + y)
+	result := (x + y + (x + y) * (x + y)) / x / y + x + y
+	assert result == 10
 }
\ No newline at end of file
diff --git a/tests/programs/reassign.q b/tests/programs/reassign.q
index df940d8..26aa3e8 100644
--- a/tests/programs/reassign.q
+++ b/tests/programs/reassign.q
@@ -2,5 +2,5 @@ main() {
 	x := 1
 	y := x + 1
 	x = 2
-	syscall(60, y)
+	assert y == 2
 }
\ No newline at end of file
diff --git a/tests/programs/return.q b/tests/programs/return.q
index 13f1e6a..f5e13d5 100644
--- a/tests/programs/return.q
+++ b/tests/programs/return.q
@@ -1,5 +1,5 @@
 main() {
-	syscall(60, f(2))
+	assert f(2) == 6
 }
 
 f(x) {
diff --git a/tests/programs/reuse.q b/tests/programs/reuse.q
index 073fd49..010f747 100644
--- a/tests/programs/reuse.q
+++ b/tests/programs/reuse.q
@@ -1,5 +1,5 @@
 main() {
-	syscall(60, f(1))
+	assert f(1) == 3
 }
 
 f(x) {
diff --git a/tests/programs/shift.q b/tests/programs/shift.q
index 1fd1ddf..2bb90b8 100644
--- a/tests/programs/shift.q
+++ b/tests/programs/shift.q
@@ -1,57 +1,15 @@
-import sys
-
 main() {
-	if 0 << 0 != 0 {
-		sys.exit(1)
-	}
-
-	if 0 >> 0 != 0 {
-		sys.exit(2)
-	}
-
-	if 1 << 0 != 1 {
-		sys.exit(3)
-	}
-
-	if 1 >> 0 != 1 {
-		sys.exit(4)
-	}
-
-	if 1 >> 1 != 0 {
-		sys.exit(5)
-	}
-
-	if 1 << 1 != 2 {
-		sys.exit(6)
-	}
-
-	if 1 << 2 != 4 {
-		sys.exit(7)
-	}
-
-	if 1 << 3 != 8 {
-		sys.exit(8)
-	}
-
-	if 1 << 4 != 16 {
-		sys.exit(9)
-	}
-
-	if 16 >> 1 != 8 {
-		sys.exit(10)
-	}
-
-	if 16 >> 2 != 4 {
-		sys.exit(11)
-	}
-
-	if 16 >> 3 != 2 {
-		sys.exit(12)
-	}
-
-	if 16 >> 4 != 1 {
-		sys.exit(13)
-	}
-
-	sys.exit(0)
+	assert 0 << 0 == 0
+	assert 0 >> 0 == 0
+	assert 1 << 0 == 1
+	assert 1 >> 0 == 1
+	assert 1 >> 1 == 0
+	assert 1 << 1 == 2
+	assert 1 << 2 == 4
+	assert 1 << 3 == 8
+	assert 1 << 4 == 16
+	assert 16 >> 1 == 8
+	assert 16 >> 2 == 4
+	assert 16 >> 3 == 2
+	assert 16 >> 4 == 1
 }
\ No newline at end of file
diff --git a/tests/programs/square-sum.q b/tests/programs/square-sum.q
index aace245..04b1237 100644
--- a/tests/programs/square-sum.q
+++ b/tests/programs/square-sum.q
@@ -1,6 +1,5 @@
 main() {
-	x := f(2, 3)
-	syscall(60, x)
+	assert f(2, 3) == 25
 }
 
 f(x, y) {
diff --git a/tests/programs_test.go b/tests/programs_test.go
index 46e2a1b..3a2d801 100644
--- a/tests/programs_test.go
+++ b/tests/programs_test.go
@@ -18,24 +18,12 @@ var programs = []struct {
 	ExitCode int
 }{
 	{"empty", "", "", 0},
-	{"math", "", "", 10},
-	{"precedence", "", "", 10},
-	{"square-sum", "", "", 25},
-	{"chained-calls", "", "", 9},
-	{"nested-calls", "", "", 4},
-	{"param", "", "", 3},
-	{"param-multi", "", "", 21},
-	{"param-order", "", "", 0},
-	{"reuse", "", "", 3},
-	{"return", "", "", 6},
-	{"reassign", "", "", 2},
-	{"branch", "", "", 0},
-	{"branch-and", "", "", 0},
-	{"branch-or", "", "", 0},
-	{"branch-both", "", "", 0},
-	{"jump-near", "", "", 0},
-	{"loop", "", "", 0},
-	{"loop-lifetime", "", "", 0},
+	{"assert", "", "", 1},
+	{"reuse", "", "", 0},
+	{"reassign", "", "", 0},
+	{"return", "", "", 0},
+	{"math", "", "", 0},
+	{"precedence", "", "", 0},
 	{"bitwise-and", "", "", 0},
 	{"bitwise-or", "", "", 0},
 	{"bitwise-xor", "", "", 0},
@@ -43,9 +31,21 @@ var programs = []struct {
 	{"modulo", "", "", 0},
 	{"modulo-assign", "", "", 0},
 	{"division-split", "", "", 0},
-	{"assert", "", "", 1},
 	{"negative", "", "", 32},
 	{"negation", "", "", 32},
+	{"square-sum", "", "", 0},
+	{"chained-calls", "", "", 0},
+	{"nested-calls", "", "", 0},
+	{"param", "", "", 0},
+	{"param-multi", "", "", 0},
+	{"param-order", "", "", 0},
+	{"branch", "", "", 0},
+	{"branch-and", "", "", 0},
+	{"branch-or", "", "", 0},
+	{"branch-both", "", "", 0},
+	{"jump-near", "", "", 0},
+	{"loop", "", "", 0},
+	{"loop-lifetime", "", "", 0},
 }
 
 func TestPrograms(t *testing.T) {