diff --git a/.github/workflows/workspace.yml b/.github/workflows/workspace.yml
index 7f9e7ed..5d70cd9 100644
--- a/.github/workflows/workspace.yml
+++ b/.github/workflows/workspace.yml
@@ -17,7 +17,7 @@ jobs:
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.85.0
+          toolchain: 1.87.0
           components: clippy
       - run: cargo clippy --all -- -D warnings
 
diff --git a/kbkdf/tests/kbkdf/parser.rs b/kbkdf/tests/kbkdf/parser.rs
index 5e48ce9..9350abb 100644
--- a/kbkdf/tests/kbkdf/parser.rs
+++ b/kbkdf/tests/kbkdf/parser.rs
@@ -37,7 +37,7 @@ impl Prf {
             "[PRF=HMAC_SHA256]" => Self::HmacSha256,
             "[PRF=HMAC_SHA384]" => Self::HmacSha384,
             "[PRF=HMAC_SHA512]" => Self::HmacSha512,
-            _ => panic!("Invalid prf: {}", s),
+            _ => panic!("Invalid prf: {s}"),
         }
     }
 
@@ -64,7 +64,7 @@ impl CounterLocation {
             "[CTRLOCATION=AFTER_FIXED]" => Self::After,
             "[CTRLOCATION=AFTER_ITER]" => Self::AfterIter,
             "[CTRLOCATION=BEFORE_ITER]" => Self::BeforeIter,
-            _ => panic!("Invalid counter_location: {}", s),
+            _ => panic!("Invalid counter_location: {s}"),
         }
     }
 
@@ -88,7 +88,7 @@ impl Rlen {
             "[RLEN=16_BITS]" => Self::Bits16,
             "[RLEN=24_BITS]" => Self::Bits24,
             "[RLEN=32_BITS]" => Self::Bits32,
-            _ => panic!("Invalid r_len: {}", s),
+            _ => panic!("Invalid r_len: {s}"),
         }
     }
 }