diff --git a/README.md b/README.md
index 3e1a870..89f7fe0 100644
--- a/README.md
+++ b/README.md
@@ -147,16 +147,15 @@ This is what generates expressions from tokens.
 
 ### Operators
 
-- [x] `=`
-- [x] `+`, `-`, `*`, `/`
-- [x] `+=`, `-=`, `*=`, `/=`
-- [x] `==`, `!=`, `<`, `<=`, `>`, `>=`
-- [x] `&&`, `||`
-- [ ] `%`
-- [ ] `<<`, `>>`
-- [ ] `<<=`, `>>=`
+- [x] `=`, `:=`
+- [x] `+`, `-`, `*`, `/`, `%`
+- [x] `+=`, `-=`, `*=`, `/=`, `%=`
 - [ ] `&`, `|`, `^`
 - [ ] `&=`, `|=`, `^=`
+- [ ] `<<`, `>>`
+- [ ] `<<=`, `>>=`
+- [x] `==`, `!=`, `<`, `<=`, `>`, `>=`
+- [x] `&&`, `||`
 
 ### Architecture
 
diff --git a/tests/programs/remainder.q b/tests/programs/remainder.q
index 392c6c8..2bbe4f5 100644
--- a/tests/programs/remainder.q
+++ b/tests/programs/remainder.q
@@ -29,7 +29,16 @@ main() {
 		sys.exit(1)
 	}
 
-	if 256 % 10 != 6 {
+	x := 256
+	x %= 100
+
+	if x != 56 {
+		sys.exit(1)
+	}
+
+	x %= 10
+
+	if x != 6 {
 		sys.exit(1)
 	}