diff --git a/Cargo.toml b/Cargo.toml
index 0f51c38b..45a133d8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "A test framework for testing rustc diagnostics output"
 repository = "https://github.com/oli-obk/ui_test"
-rust-version = "1.63"
+rust-version = "1.70"
 
 [lib]
 test = true     # we have unit tests
diff --git a/src/aux_builds.rs b/src/aux_builds.rs
index a67b3d07..1ea6fa63 100644
--- a/src/aux_builds.rs
+++ b/src/aux_builds.rs
@@ -104,7 +104,7 @@ impl Build for AuxBuilder {
 
         match CrateType::from_file_contents(&file_contents) {
             // Proc macros must be run on the host
-            CrateType::ProcMacro => config.target = config.host.clone(),
+            CrateType::ProcMacro => config.target.clone_from(&config.host),
             CrateType::Test | CrateType::Bin | CrateType::Lib => {}
         }
 
diff --git a/src/config.rs b/src/config.rs
index b2432ba1..2fb728e5 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -127,7 +127,7 @@ impl Config {
             #[cfg(windows)]
             (Match::Exact(br"\\?\".to_vec()), b"".to_vec()),
         ];
-        comment_defaults.base().normalize_stderr = filters.clone();
+        comment_defaults.base().normalize_stderr.clone_from(&filters);
         comment_defaults.base().normalize_stdout = filters;
         comment_defaults.base().exit_status = Spanned::dummy(1).into();
         comment_defaults.base().require_annotations = Spanned::dummy(true).into();
diff --git a/src/dependencies.rs b/src/dependencies.rs
index a8a7f125..327bd40a 100644
--- a/src/dependencies.rs
+++ b/src/dependencies.rs
@@ -91,11 +91,10 @@ fn build_dependencies_inner(
     }
 
     // Reusable closure for setting up the environment both for artifact generation and `cargo_metadata`
-    let set_locking = |cmd: &mut Command| match config.output_conflict_handling {
-        OutputConflictHandling::Error => {
+    let set_locking = |cmd: &mut Command| {
+        if let OutputConflictHandling::Error = config.output_conflict_handling {
             cmd.arg("--locked");
         }
-        _ => {}
     };
 
     set_locking(&mut build);
diff --git a/src/parser.rs b/src/parser.rs
index 42004462..b070e21a 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -744,7 +744,7 @@ impl CommentParser<Comments> {
             }
             "check-pass" => (this, _args, span){
                 _ = this.exit_status.set(0, span.clone());
-                _ = this.require_annotations = Spanned::new(false, span.clone()).into();
+                this.require_annotations = Spanned::new(false, span.clone()).into();
             }
             "require-annotations-for-level" => (this, args, span){
                 let args = args.trim();
diff --git a/src/per_test_config.rs b/src/per_test_config.rs
index 97728eed..22673429 100644
--- a/src/per_test_config.rs
+++ b/src/per_test_config.rs
@@ -98,7 +98,7 @@ impl TestConfig<'_> {
                                 // Overwrite previous value so that revisions overwrite default settings
                                 // FIXME: report an error if multiple revisions conflict
                                 assert_eq!(o.get().len(), 1);
-                                o.get_mut()[0] = &flag;
+                                o.get_mut()[0] = flag;
                             } else {
                                 o.get_mut().push(flag);
                             }