diff --git a/num_enum/tests/try_build/compile_fail/conflicting_derive.stderr_nightly b/num_enum/tests/try_build/compile_fail/conflicting_derive.stderr_nightly
deleted file mode 100644
index 55a0a23..0000000
--- a/num_enum/tests/try_build/compile_fail/conflicting_derive.stderr_nightly
+++ /dev/null
@@ -1,20 +0,0 @@
-error[E0119]: conflicting implementations of trait `std::convert::TryFrom<u8>` for type `Numbers`
- --> $DIR/conflicting_derive.rs:1:35
-  |
-1 | #[derive(num_enum::FromPrimitive, num_enum::TryFromPrimitive)]
-  |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^
-  |
-  = note: conflicting implementation in crate `core`:
-          - impl<T, U> TryFrom<U> for T
-            where U: Into<T>;
-  = note: this error originates in the derive macro `num_enum::TryFromPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
-
-error[E0119]: conflicting implementations of trait `num_enum::TryFromPrimitive` for type `Numbers`
- --> $DIR/conflicting_derive.rs:1:35
-  |
-1 | #[derive(num_enum::FromPrimitive, num_enum::TryFromPrimitive)]
-  |          -----------------------  ^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `Numbers`
-  |          |
-  |          first implementation here
-  |
-  = note: this error originates in the derive macro `num_enum::TryFromPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/num_enum/tests/try_build/compile_fail/exhaustive_enum.stderr_nightly b/num_enum/tests/try_build/compile_fail/exhaustive_enum.stderr_nightly
deleted file mode 100644
index 6ba5318..0000000
--- a/num_enum/tests/try_build/compile_fail/exhaustive_enum.stderr_nightly
+++ /dev/null
@@ -1,7 +0,0 @@
-error: #[derive(FromPrimitive)] requires a variant marked with `#[num_enum(default)]`
- --> $DIR/exhaustive_enum.rs:1:10
-  |
-1 | #[derive(num_enum::FromPrimitive)]
-  |          ^^^^^^^^^^^^^^^^^^^^^^^
-  |
-  = note: this error originates in the derive macro `num_enum::FromPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/num_enum/tests/try_build/compile_fail/missing_default.stderr_nightly b/num_enum/tests/try_build/compile_fail/missing_default.stderr_nightly
deleted file mode 100644
index 2c0a3ad..0000000
--- a/num_enum/tests/try_build/compile_fail/missing_default.stderr_nightly
+++ /dev/null
@@ -1,7 +0,0 @@
-error: #[derive(FromPrimitive)] requires a variant marked with `#[num_enum(default)]`
- --> $DIR/missing_default.rs:1:10
-  |
-1 | #[derive(num_enum::FromPrimitive)]
-  |          ^^^^^^^^^^^^^^^^^^^^^^^
-  |
-  = note: this error originates in the derive macro `num_enum::FromPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/num_enum/tests/try_build/compile_fail/missing_repr.stderr_nightly b/num_enum/tests/try_build/compile_fail/missing_repr.stderr_nightly
deleted file mode 100644
index 6b0c81b..0000000
--- a/num_enum/tests/try_build/compile_fail/missing_repr.stderr_nightly
+++ /dev/null
@@ -1,7 +0,0 @@
-error: Missing `#[repr({Integer})]` attribute
- --> $DIR/missing_repr.rs:1:10
-  |
-1 | #[derive(num_enum::IntoPrimitive)]
-  |          ^^^^^^^^^^^^^^^^^^^^^^^
-  |
-  = note: this error originates in the derive macro `num_enum::IntoPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/num_enum/tests/try_build/compile_fail/unreachable_patterns.stderr_nightly b/num_enum/tests/try_build/compile_fail/unreachable_patterns.stderr_nightly
deleted file mode 100644
index 7c27908..0000000
--- a/num_enum/tests/try_build/compile_fail/unreachable_patterns.stderr_nightly
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unreachable pattern
- --> $DIR/unreachable_patterns.rs:7:5
-  |
-7 |     Two = 2,
-  |     ^^^
-  |
-note: the lint level is defined here
- --> $DIR/unreachable_patterns.rs:1:10
-  |
-1 | #[derive(num_enum::TryFromPrimitive)]
-  |          ^^^^^^^^^^^^^^^^^^^^^^^^^^
-  = note: this error originates in the derive macro `num_enum::TryFromPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)