diff --git a/vlib/v/checker/tests/assign_expr_unresolved_variables_err_chain.out b/vlib/v/checker/tests/assign_expr_unresolved_variables_err_chain.out
new file mode 100644
index 0000000000..da2e847e7d
--- /dev/null
+++ b/vlib/v/checker/tests/assign_expr_unresolved_variables_err_chain.out
@@ -0,0 +1,13 @@
+vlib/v/checker/tests/assign_expr_unresolved_variables_err_chain.vv:2:7: error: undefined variable `b` (used before declaration) 
+    1 | fn main() {
+    2 |     a := b
+      |          ^
+    3 |     b := c
+    4 |     c := a
+vlib/v/checker/tests/assign_expr_unresolved_variables_err_chain.vv:3:7: error: undefined variable `c` (used before declaration) 
+    1 | fn main() {
+    2 |     a := b
+    3 |     b := c
+      |          ^
+    4 |     c := a
+    5 | }
diff --git a/vlib/v/checker/tests/run/assign_expr_unresolved_variables_err_chain.vv b/vlib/v/checker/tests/assign_expr_unresolved_variables_err_chain.vv
similarity index 100%
rename from vlib/v/checker/tests/run/assign_expr_unresolved_variables_err_chain.vv
rename to vlib/v/checker/tests/assign_expr_unresolved_variables_err_chain.vv
diff --git a/vlib/v/checker/tests/run/assign_expr_unresolved_variables_err_chain.run.out b/vlib/v/checker/tests/run/assign_expr_unresolved_variables_err_chain.run.out
deleted file mode 100644
index 50b56b24c0..0000000000
--- a/vlib/v/checker/tests/run/assign_expr_unresolved_variables_err_chain.run.out
+++ /dev/null
@@ -1,13 +0,0 @@
-vlib/v/checker/tests/run/assign_expr_unresolved_variables_err_chain.vv:2:7: error: undefined variable `b` (used before declaration) 
-    1 | fn main() {
-    2 |     a := b
-      |          ^
-    3 |     b := c
-    4 |     c := a
-vlib/v/checker/tests/run/assign_expr_unresolved_variables_err_chain.vv:3:7: error: undefined variable `c` (used before declaration) 
-    1 | fn main() {
-    2 |     a := b
-    3 |     b := c
-      |          ^
-    4 |     c := a
-    5 | }
diff --git a/vlib/v/checker/tests/run/unused_variable_warning.run.out b/vlib/v/checker/tests/run/unused_variable_warning.run.out
new file mode 100644
index 0000000000..9fa8e3cf50
--- /dev/null
+++ b/vlib/v/checker/tests/run/unused_variable_warning.run.out
@@ -0,0 +1,15 @@
+vlib/v/checker/tests/run/unused_variable_warning.vv:3:2: warning: unused variable: `a`
+    1 | // NB: this test should compile and run, but it also should produce a compiler warning.
+    2 | fn main() {
+    3 |     a := 1
+      |     ^
+    4 |     b := 2
+    5 |     println('hello')
+vlib/v/checker/tests/run/unused_variable_warning.vv:4:2: warning: unused variable: `b`
+    2 | fn main() {
+    3 |     a := 1
+    4 |     b := 2
+      |     ^
+    5 |     println('hello')
+    6 | }
+hello
diff --git a/vlib/v/checker/tests/run/unused_variable_warning.vv b/vlib/v/checker/tests/run/unused_variable_warning.vv
new file mode 100644
index 0000000000..1611e54466
--- /dev/null
+++ b/vlib/v/checker/tests/run/unused_variable_warning.vv
@@ -0,0 +1,6 @@
+// NB: this test should compile and run, but it also should produce a compiler warning.
+fn main() {
+	a := 1
+	b := 2
+	println('hello')
+}