diff --git a/crates/intrinsic-test/src/common/argument.rs b/crates/intrinsic-test/src/common/argument.rs
index 5fb7d0f210..385cf32d3b 100644
--- a/crates/intrinsic-test/src/common/argument.rs
+++ b/crates/intrinsic-test/src/common/argument.rs
@@ -60,9 +60,15 @@ where
     }
 
     /// The name (e.g. "A_VALS" or "a_vals") for the array of possible test inputs.
-    fn rust_vals_array_name(&self) -> impl std::fmt::Display {
+    pub(crate) fn rust_vals_array_name(&self) -> impl std::fmt::Display {
         if self.ty.is_rust_vals_array_const() {
-            format!("{}_VALS", self.name.to_uppercase())
+            let loads = crate::common::gen_rust::PASSES;
+            format!(
+                "{}_{ty}_{load_size}",
+                self.name.to_uppercase(),
+                ty = self.ty.rust_scalar_type(),
+                load_size = self.ty.num_lanes() * self.ty.num_vectors() + loads - 1,
+            )
         } else {
             format!("{}_vals", self.name.to_lowercase())
         }
@@ -134,20 +140,34 @@ where
         loads: u32,
     ) -> std::io::Result<()> {
         for arg in self.iter().filter(|&arg| !arg.has_constraint()) {
-            writeln!(
-                w,
-                "{indentation}{bind} {name}: [{ty}; {load_size}] = {values};",
-                bind = arg.rust_vals_array_binding(),
-                name = arg.rust_vals_array_name(),
-                ty = arg.ty.rust_scalar_type(),
-                load_size = arg.ty.num_lanes() * arg.ty.num_vectors() + loads - 1,
-                values = arg.ty.populate_random(indentation, loads, &Language::Rust)
-            )?
+            // Constants are defined globally.
+            if arg.ty.is_rust_vals_array_const() {
+                continue;
+            }
+
+            Self::gen_arg_rust(arg, w, indentation, loads)?;
         }
 
         Ok(())
     }
 
+    pub fn gen_arg_rust(
+        arg: &Argument<T>,
+        w: &mut impl std::io::Write,
+        indentation: Indentation,
+        loads: u32,
+    ) -> std::io::Result<()> {
+        writeln!(
+            w,
+            "{indentation}{bind} {name}: [{ty}; {load_size}] = {values};\n",
+            bind = arg.rust_vals_array_binding(),
+            name = arg.rust_vals_array_name(),
+            ty = arg.ty.rust_scalar_type(),
+            load_size = arg.ty.num_lanes() * arg.ty.num_vectors() + loads - 1,
+            values = arg.ty.populate_random(indentation, loads, &Language::Rust)
+        )
+    }
+
     /// Creates a line for each argument that initializes the argument from an array `[arg]_vals` at
     /// an offset `i` using a load intrinsic, in C.
     /// e.g `uint8x8_t a = vld1_u8(&a_vals[i]);`
diff --git a/crates/intrinsic-test/src/common/gen_rust.rs b/crates/intrinsic-test/src/common/gen_rust.rs
index 27f49a37b1..c8d815e46e 100644
--- a/crates/intrinsic-test/src/common/gen_rust.rs
+++ b/crates/intrinsic-test/src/common/gen_rust.rs
@@ -1,24 +1,31 @@
 use itertools::Itertools;
 use std::process::Command;
 
+use crate::common::argument::ArgumentList;
 use crate::common::intrinsic::Intrinsic;
 
 use super::indentation::Indentation;
 use super::intrinsic_helpers::IntrinsicTypeDefinition;
 
 // The number of times each intrinsic will be called.
-const PASSES: u32 = 20;
+pub(crate) const PASSES: u32 = 20;
+
+macro_rules! concatln {
+    ($($lines:expr),* $(,)?) => {
+        concat!($( $lines, "\n" ),*)
+    };
+}
 
 fn write_cargo_toml_header(w: &mut impl std::io::Write, name: &str) -> std::io::Result<()> {
     writeln!(
         w,
-        concat!(
-            "[package]\n",
-            "name = \"{name}\"\n",
-            "version = \"{version}\"\n",
-            "authors = [{authors}]\n",
-            "license = \"{license}\"\n",
-            "edition = \"2018\"\n",
+        concatln!(
+            "[package]",
+            "name = \"{name}\"",
+            "version = \"{version}\"",
+            "authors = [{authors}]",
+            "license = \"{license}\"",
+            "edition = \"2018\"",
         ),
         name = name,
         version = env!("CARGO_PKG_VERSION"),
@@ -118,6 +125,20 @@ pub fn write_lib_rs<T: IntrinsicTypeDefinition>(
 
     writeln!(w, "{definitions}")?;
 
+    let mut seen = std::collections::HashSet::new();
+
+    for intrinsic in intrinsics {
+        for arg in &intrinsic.arguments.args {
+            if !arg.has_constraint() && arg.ty.is_rust_vals_array_const() {
+                let name = arg.rust_vals_array_name().to_string();
+
+                if seen.insert(name) {
+                    ArgumentList::gen_arg_rust(arg, w, Indentation::default(), PASSES)?;
+                }
+            }
+        }
+    }
+
     for intrinsic in intrinsics {
         crate::common::gen_rust::create_rust_test_module(w, intrinsic)?;
     }
@@ -232,23 +253,23 @@ pub fn generate_rust_test_loop<T: IntrinsicTypeDefinition>(
         }
     }
 
-    let indentation2 = indentation.nested();
-    let indentation3 = indentation2.nested();
-    writeln!(
+    write!(
         w,
-        "\
-            for (id, f) in specializations {{\n\
-                for i in 0..{passes} {{\n\
-                    unsafe {{\n\
-                        {loaded_args}\
-                        let __return_value = f({args});\n\
-                        println!(\"Result {{id}}-{{}}: {{:?}}\", i + 1, {return_value});\n\
-                    }}\n\
-                }}\n\
-            }}",
-        loaded_args = intrinsic.arguments.load_values_rust(indentation3),
+        concatln!(
+            "    for (id, f) in specializations {{",
+            "        for i in 0..{passes} {{",
+            "            unsafe {{",
+            "{loaded_args}",
+            "                let __return_value = f({args});",
+            "                println!(\"Result {{id}}-{{}}: {{:?}}\", i + 1, {return_value});",
+            "            }}",
+            "        }}",
+            "    }}",
+        ),
+        loaded_args = intrinsic.arguments.load_values_rust(indentation.nest_by(4)),
         args = intrinsic.arguments.as_call_param_rust(),
         return_value = intrinsic.results.print_result_rust(),
+        passes = passes,
     )
 }
 
diff --git a/crates/intrinsic-test/src/common/indentation.rs b/crates/intrinsic-test/src/common/indentation.rs
index 9ee331d7f7..9c2cc886e6 100644
--- a/crates/intrinsic-test/src/common/indentation.rs
+++ b/crates/intrinsic-test/src/common/indentation.rs
@@ -10,6 +10,10 @@ impl Indentation {
     pub fn nested(self) -> Self {
         Self(self.0 + 1)
     }
+
+    pub fn nest_by(&self, additional_levels: u32) -> Self {
+        Self(self.0 + additional_levels)
+    }
 }
 
 impl std::fmt::Display for Indentation {