diff --git a/tests/interpolation.rs b/tests/interpolation.rs
index b172e26..aeff296 100644
--- a/tests/interpolation.rs
+++ b/tests/interpolation.rs
@@ -13,3 +13,8 @@ test!(
     "a {\n  color: #{'red'};\n}\n",
     "a {\n  color: red;\n}\n"
 );
+test!(
+    number_after_interpolation,
+    "a {\n  color: a#{foo}1;\n}\n",
+    "a {\n  color: afoo1;\n}\n"
+);
diff --git a/tests/misc.rs b/tests/misc.rs
index da26c21..ccfca53 100644
--- a/tests/misc.rs
+++ b/tests/misc.rs
@@ -22,3 +22,8 @@ test!(
     emits_double_newline_between_unrelated_styles,
     "a {\n  color: red;\n}\n\nb {\n  color: blue;\n}\n"
 );
+test!(
+    variable_interchangable_hypen_dash,
+    "$a-b: red; $a_b: green; a {\n  color: $a-b;\n}\n",
+    "a {\n  color: green;\n}\n"
+);