diff --git a/crates/intrinsic-test/src/arm/compile.rs b/crates/intrinsic-test/src/arm/compile.rs
index 48a8ed950e..7da35f9a11 100644
--- a/crates/intrinsic-test/src/arm/compile.rs
+++ b/crates/intrinsic-test/src/arm/compile.rs
@@ -6,16 +6,16 @@ pub fn build_cpp_compilation(config: &ProcessedCli) -> Option<CppCompilation> {
 
     // -ffp-contract=off emulates Rust's approach of not fusing separate mul-add operations
     let mut command = CompilationCommandBuilder::new()
-        .add_arch_flags(vec!["armv8.6-a", "crypto", "crc", "dotprod", "fp16"])
+        .add_arch_flags(["armv8.6-a", "crypto", "crc", "dotprod", "fp16"])
         .set_compiler(cpp_compiler)
         .set_target(&config.target)
         .set_opt_level("2")
         .set_cxx_toolchain_dir(config.cxx_toolchain_dir.as_deref())
         .set_project_root("c_programs")
-        .add_extra_flags(vec!["-ffp-contract=off", "-Wno-narrowing"]);
+        .add_extra_flags(["-ffp-contract=off", "-Wno-narrowing"]);
 
     if !config.target.contains("v7") {
-        command = command.add_arch_flags(vec!["faminmax", "lut", "sha3"]);
+        command = command.add_arch_flags(["faminmax", "lut", "sha3"]);
     }
 
     if !cpp_compiler.contains("clang") {
diff --git a/crates/intrinsic-test/src/common/compile_c.rs b/crates/intrinsic-test/src/common/compile_c.rs
index 0c905a149e..258e418165 100644
--- a/crates/intrinsic-test/src/common/compile_c.rs
+++ b/crates/intrinsic-test/src/common/compile_c.rs
@@ -37,9 +37,9 @@ impl CompilationCommandBuilder {
         self
     }
 
-    pub fn add_arch_flags(mut self, flags: Vec<&str>) -> Self {
-        let mut new_arch_flags = flags.into_iter().map(|v| v.to_string()).collect();
-        self.arch_flags.append(&mut new_arch_flags);
+    pub fn add_arch_flags<'a>(mut self, flags: impl IntoIterator<Item = &'a str>) -> Self {
+        self.arch_flags
+            .extend(flags.into_iter().map(|s| s.to_owned()));
 
         self
     }
@@ -55,14 +55,15 @@ impl CompilationCommandBuilder {
         self
     }
 
-    pub fn add_extra_flags(mut self, flags: Vec<&str>) -> Self {
-        let mut flags: Vec<String> = flags.into_iter().map(|f| f.to_string()).collect();
-        self.extra_flags.append(&mut flags);
+    pub fn add_extra_flags<'a>(mut self, flags: impl IntoIterator<Item = &'a str>) -> Self {
+        self.extra_flags
+            .extend(flags.into_iter().map(|s| s.to_owned()));
+
         self
     }
 
     pub fn add_extra_flag(self, flag: &str) -> Self {
-        self.add_extra_flags(vec![flag])
+        self.add_extra_flags([flag])
     }
 }