diff --git a/hashes/src/hmac.rs b/hashes/src/hmac.rs
index 2f2bbaff4..4a90cc043 100644
--- a/hashes/src/hmac.rs
+++ b/hashes/src/hmac.rs
@@ -168,10 +168,10 @@ mod tests {
         use crate::{sha256, GeneralHash as _, Hash as _, HashEngine, Hmac, HmacEngine};
 
         #[derive(Clone)]
-        struct Test<'a> {
-            key: &'a [u8],
-            input: &'a [u8],
-            output: &'a [u8],
+        struct Test {
+            key: &'static [u8],
+            input: &'static [u8],
+            output: [u8; 32],
         }
 
         #[rustfmt::skip]
@@ -180,9 +180,9 @@ mod tests {
             // Sadly the RFC2104 test vectors all use MD5 as their underlying hash function,
             // which of course this library does not support.
             Test {
-                key: &[ 0x0b; 20],
-                input: &[0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65],
-                output: &[
+                key: &[ 0x0b; 20 ],
+                input: &[ 0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65 ],
+                output: [
                     0xb0, 0x34, 0x4c, 0x61, 0xd8, 0xdb, 0x38, 0x53,
                     0x5c, 0xa8, 0xaf, 0xce, 0xaf, 0x0b, 0xf1, 0x2b,
                     0x88, 0x1d, 0xc2, 0x00, 0xc9, 0x83, 0x3d, 0xa7,
@@ -197,7 +197,7 @@ mod tests {
                     0x66, 0x6f, 0x72, 0x20, 0x6e, 0x6f, 0x74, 0x68,
                     0x69, 0x6e, 0x67, 0x3f,
                 ],
-                output: &[
+                output: [
                     0x5b, 0xdc, 0xc1, 0x46, 0xbf, 0x60, 0x75, 0x4e,
                     0x6a, 0x04, 0x24, 0x26, 0x08, 0x95, 0x75, 0xc7,
                     0x5a, 0x00, 0x3f, 0x08, 0x9d, 0x27, 0x39, 0x83,
@@ -207,7 +207,7 @@ mod tests {
             Test {
                 key: &[ 0xaa; 20 ],
                 input: &[ 0xdd; 50 ],
-                output: &[
+                output: [
                     0x77, 0x3e, 0xa9, 0x1e, 0x36, 0x80, 0x0e, 0x46,
                     0x85, 0x4d, 0xb8, 0xeb, 0xd0, 0x91, 0x81, 0xa7,
                     0x29, 0x59, 0x09, 0x8b, 0x3e, 0xf8, 0xc1, 0x22,
@@ -222,7 +222,7 @@ mod tests {
                     0x19
                 ],
                 input: &[ 0xcd; 50 ],
-                output: &[
+                output: [
                     0x82, 0x55, 0x8a, 0x38, 0x9a, 0x44, 0x3c, 0x0e,
                     0xa4, 0xcc, 0x81, 0x98, 0x99, 0xf2, 0x08, 0x3a,
                     0x85, 0xf0, 0xfa, 0xa3, 0xe5, 0x78, 0xf8, 0x07,
@@ -240,7 +240,7 @@ mod tests {
                     0x48, 0x61, 0x73, 0x68, 0x20, 0x4b, 0x65, 0x79,
                     0x20, 0x46, 0x69, 0x72, 0x73, 0x74,
                 ],
-                output: &[
+                output: [
                     0x60, 0xe4, 0x31, 0x59, 0x1e, 0xe0, 0xb6, 0x7f,
                     0x0d, 0x8a, 0x26, 0xaa, 0xcb, 0xf5, 0xb7, 0x7f,
                     0x8e, 0x0b, 0xc6, 0x21, 0x37, 0x28, 0xc5, 0x14,
@@ -270,7 +270,7 @@ mod tests {
                     0x20, 0x48, 0x4d, 0x41, 0x43, 0x20, 0x61, 0x6c,
                     0x67, 0x6f, 0x72, 0x69, 0x74, 0x68, 0x6d, 0x2e,
                 ],
-                output: &[
+                output: [
                     0x9b, 0x09, 0xff, 0xa7, 0x1b, 0x94, 0x2f, 0xcb,
                     0x27, 0x63, 0x5f, 0xbc, 0xd5, 0xb0, 0xe9, 0x44,
                     0xbf, 0xdc, 0x63, 0x64, 0x4f, 0x07, 0x13, 0x93,
@@ -284,7 +284,7 @@ mod tests {
             engine.input(test.input);
             let hash = Hmac::<sha256::Hash>::from_engine(engine);
             assert_eq!(hash.as_ref(), test.output);
-            assert_eq!(hash.as_byte_array(), test.output);
+            assert_eq!(hash.to_byte_array(), test.output);
         }
     }