diff --git a/fine/tests/expression/errors/while_not_bool.fine b/fine/tests/expression/errors/while_not_bool.fine
new file mode 100644
index 00000000..edd47dc8
--- /dev/null
+++ b/fine/tests/expression/errors/while_not_bool.fine
@@ -0,0 +1,6 @@
+fun test() {
+  while 12 {}
+}
+
+// @expect-errors:
+// | 2:8: the condition of the while loop must produce a boolean
diff --git a/fine/tests/expression/loops.fine b/fine/tests/expression/loops.fine
new file mode 100644
index 00000000..d0b67c55
--- /dev/null
+++ b/fine/tests/expression/loops.fine
@@ -0,0 +1,12 @@
+fun test() -> f64 {
+  let result = 1;
+  let i = 0;
+  while i < 10 {
+    result = result * 2;
+    i = i + 1;
+  }
+  result
+}
+
+// @no-errors
+// @eval: Float(1024.0)
\ No newline at end of file