diff --git a/testcrate/tests/compile-fail/enum-with-discriminants.rs b/testcrate/tests/compile-fail/enum-with-discriminants.rs
index b648617..dbc300b 100644
--- a/testcrate/tests/compile-fail/enum-with-discriminants.rs
+++ b/testcrate/tests/compile-fail/enum-with-discriminants.rs
@@ -8,3 +8,5 @@ enum Enum {
     Foo,
     Bar = 42,
 }
+
+fn main() {}
diff --git a/testcrate/tests/compile-fail/enum-zero-variants.rs b/testcrate/tests/compile-fail/enum-zero-variants.rs
index ca3492c..6b3c7b5 100644
--- a/testcrate/tests/compile-fail/enum-zero-variants.rs
+++ b/testcrate/tests/compile-fail/enum-zero-variants.rs
@@ -5,3 +5,5 @@ extern crate derive_new;
 //~^ ERROR proc-macro derive
 //~^^ HELP #[derive(new)] cannot be implemented for enums with zero variants
 enum Enum {}
+
+fn main() {}
diff --git a/testcrate/tests/compile-fail/multiple-new-attrs.rs b/testcrate/tests/compile-fail/multiple-new-attrs.rs
index 1e3a787..c4591ad 100644
--- a/testcrate/tests/compile-fail/multiple-new-attrs.rs
+++ b/testcrate/tests/compile-fail/multiple-new-attrs.rs
@@ -10,3 +10,5 @@ struct Foo {
     #[new(value = "42")]
     y: i32,
 }
+
+fn main() {}
diff --git a/testcrate/tests/compile-fail/new-invalid-attr-type.rs b/testcrate/tests/compile-fail/new-invalid-attr-type.rs
index 7f55756..11096cc 100644
--- a/testcrate/tests/compile-fail/new-invalid-attr-type.rs
+++ b/testcrate/tests/compile-fail/new-invalid-attr-type.rs
@@ -8,3 +8,5 @@ struct Foo {
     #[new = "foo"]
     x: i32,
 }
+
+fn main() {}
diff --git a/testcrate/tests/compile-fail/new-invalid-value.rs b/testcrate/tests/compile-fail/new-invalid-value.rs
index 7fab768..a7d2ec4 100644
--- a/testcrate/tests/compile-fail/new-invalid-value.rs
+++ b/testcrate/tests/compile-fail/new-invalid-value.rs
@@ -5,6 +5,8 @@ extern crate derive_new;
 //~^ ERROR produced unparsable tokens
 struct Foo {
     #[new(value = "hello@world")]
-//~^ ERROR expected one of
+    //~^ ERROR expected one of
     x: i32,
 }
+
+fn main() {}
diff --git a/testcrate/tests/compile-fail/new-list-invalid.rs b/testcrate/tests/compile-fail/new-list-invalid.rs
index c64e07d..b7a13af 100644
--- a/testcrate/tests/compile-fail/new-list-invalid.rs
+++ b/testcrate/tests/compile-fail/new-list-invalid.rs
@@ -8,3 +8,5 @@ struct Foo {
     #[new(foo)]
     x: i32,
 }
+
+fn main() {}
diff --git a/testcrate/tests/compile-fail/new-name-value-invalid.rs b/testcrate/tests/compile-fail/new-name-value-invalid.rs
index e3f2625..a1fba92 100644
--- a/testcrate/tests/compile-fail/new-name-value-invalid.rs
+++ b/testcrate/tests/compile-fail/new-name-value-invalid.rs
@@ -8,3 +8,5 @@ struct Foo {
     #[new(foo = "bar")]
     x: i32,
 }
+
+fn main() {}
diff --git a/testcrate/tests/compile-fail/new-nested-list.rs b/testcrate/tests/compile-fail/new-nested-list.rs
index 88aec1f..2c40aa2 100644
--- a/testcrate/tests/compile-fail/new-nested-list.rs
+++ b/testcrate/tests/compile-fail/new-nested-list.rs
@@ -8,3 +8,5 @@ struct Foo {
     #[new(foo("bar"))]
     x: i32,
 }
+
+fn main() {}
diff --git a/testcrate/tests/compile-fail/new-nested-literal.rs b/testcrate/tests/compile-fail/new-nested-literal.rs
index 8fe3c6e..cea3c54 100644
--- a/testcrate/tests/compile-fail/new-nested-literal.rs
+++ b/testcrate/tests/compile-fail/new-nested-literal.rs
@@ -3,8 +3,10 @@ extern crate derive_new;
 
 #[derive(new)]
 //~^ ERROR proc-macro derive
-//~^^ HELP Invalid #[new] attribute: literal value in #[new(..)]
+//~^^ HELP Invalid #[new] attribute: expected identifier
 struct Foo {
     #[new("foo")]
     x: i32,
 }
+
+fn main() {}
diff --git a/testcrate/tests/compile-fail/new-non-literal-value.rs b/testcrate/tests/compile-fail/new-non-literal-value.rs
index 531adfc..232d24a 100644
--- a/testcrate/tests/compile-fail/new-non-literal-value.rs
+++ b/testcrate/tests/compile-fail/new-non-literal-value.rs
@@ -8,3 +8,5 @@ struct Foo {
     #[new(value = false)]
     x: i32,
 }
+
+fn main() {}