diff --git a/exercises/10_modules/modules1.rs b/exercises/10_modules/modules1.rs
index d97ab23a..65335ded 100644
--- a/exercises/10_modules/modules1.rs
+++ b/exercises/10_modules/modules1.rs
@@ -14,3 +14,13 @@ mod sausage_factory {
 fn main() {
     sausage_factory::make_sausage();
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_make_sausage() {
+        sausage_factory::make_sausage();
+    }
+}
diff --git a/solutions/10_modules/modules1.rs b/solutions/10_modules/modules1.rs
index 873b4127..c9690549 100644
--- a/solutions/10_modules/modules1.rs
+++ b/solutions/10_modules/modules1.rs
@@ -13,3 +13,13 @@ mod sausage_factory {
 fn main() {
     sausage_factory::make_sausage();
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_make_sausage() {
+        sausage_factory::make_sausage();
+    }
+}