diff --git a/Cargo.toml b/Cargo.toml
index 122b49f..11db88f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,5 +11,9 @@ owo-colors = "4.2.0"
 [profile.release]
 debug = 1
 
+
 [dev-dependencies]
 tempfile = "3.18.0"
+
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = ['cfg(slow_tests)'] }
diff --git a/src/inst.rs b/src/inst.rs
index ba5581e..82c16ed 100644
--- a/src/inst.rs
+++ b/src/inst.rs
@@ -1126,11 +1126,8 @@ mod tests {
     use std::io::Write;
 
     #[test]
+    #[cfg_attr(not(slow_tests), ignore)]
     fn exhaustive_decode_no_panic() {
-        if std::env::var("SLOW_TESTS").is_err() {
-            return;
-        }
-
         for i in 0..u32::MAX {
             if (i % (2 << 25)) == 0 {
                 let percent = i as f32 / (u32::MAX as f32);