diff --git a/library/stdarch/.github/workflows/main.yml b/library/stdarch/.github/workflows/main.yml
index 5c84e856d54b..aabe44a1c572 100644
--- a/library/stdarch/.github/workflows/main.yml
+++ b/library/stdarch/.github/workflows/main.yml
@@ -297,6 +297,7 @@ jobs:
         rustup component add rust-src
         echo "CARGO_UNSTABLE_BUILD_STD=std" >> $GITHUB_ENV
       if: ${{ matrix.build_std }}
+    - run: rustup component add rustfmt
 
     # Configure some env vars based on matrix configuration
     - run: echo "PROFILE=${{ matrix.profile }}" >> $GITHUB_ENV
diff --git a/library/stdarch/crates/intrinsic-test/src/common/argument.rs b/library/stdarch/crates/intrinsic-test/src/common/argument.rs
index 885d5e998ef5..7a08a01246b8 100644
--- a/library/stdarch/crates/intrinsic-test/src/common/argument.rs
+++ b/library/stdarch/crates/intrinsic-test/src/common/argument.rs
@@ -4,7 +4,6 @@
 
 use super::constraint::Constraint;
 use super::gen_rust::PASSES;
-use super::indentation::Indentation;
 use super::intrinsic_helpers::IntrinsicTypeDefinition;
 
 /// An argument for the intrinsic.
@@ -149,37 +148,36 @@ pub fn as_c_call_param_rust(&self) -> String {
     pub fn gen_arg_rust(
         arg: &Argument<T>,
         w: &mut impl std::io::Write,
-        indentation: Indentation,
         loads: u32,
     ) -> std::io::Result<()> {
         writeln!(
             w,
-            "{indentation}static {name}: [{ty}; {load_size}] = {values};\n",
+            "static {name}: [{ty}; {load_size}] = {values};\n",
             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)
+            values = arg.ty.populate_random(loads)
         )
     }
 
     /// Creates a line for each argument that initializes the argument from array `[ARG]_VALS` at
     /// an offset `i` using a load intrinsic, in Rust.
     /// e.g `let a = vld1_u8(A_VALS.as_ptr().offset(i));`
-    pub fn load_values_rust(&self, indentation: Indentation) -> String {
+    pub fn load_values_rust(&self) -> String {
         self.iter()
             .filter(|&arg| !arg.has_constraint())
             .enumerate()
             .map(|(idx, arg)| {
                 if arg.is_simd() {
                     format!(
-                        "{indentation}let {name} = {load}({vals_name}.as_ptr().add((i+{idx}) % {PASSES}) as _);\n",
+                        "let {name} = {load}({vals_name}.as_ptr().add((i+{idx}) % {PASSES}) as _);\n",
                         name = arg.generate_name(),
                         vals_name = arg.rust_vals_array_name(),
                         load = arg.ty.get_load_function(),
                     )
                 } else {
                     format!(
-                        "{indentation}let {name} = {vals_name}[(i+{idx}) % {PASSES}];\n",
+                        "let {name} = {vals_name}[(i+{idx}) % {PASSES}];\n",
                         name = arg.generate_name(),
                         vals_name = arg.rust_vals_array_name(),
                     )
diff --git a/library/stdarch/crates/intrinsic-test/src/common/gen_rust.rs b/library/stdarch/crates/intrinsic-test/src/common/gen_rust.rs
index d23710451d47..15d7f0bec25a 100644
--- a/library/stdarch/crates/intrinsic-test/src/common/gen_rust.rs
+++ b/library/stdarch/crates/intrinsic-test/src/common/gen_rust.rs
@@ -1,6 +1,7 @@
+use std::process::Command;
+
 use itertools::Itertools;
 
-use super::indentation::Indentation;
 use super::intrinsic_helpers::IntrinsicTypeDefinition;
 use crate::common::argument::ArgumentList;
 use crate::common::intrinsic::Intrinsic;
@@ -36,6 +37,22 @@ macro_rules! concatln {
     };
 }
 
+/// Run rustfmt on the generated source code
+pub fn run_rustfmt(source_path: &str) {
+    let output = Command::new("rustfmt")
+        .args([source_path])
+        .output()
+        .expect("failed to run rustfmt on generated sources");
+
+    if !output.status.success() {
+        panic!(
+            "failed to run rustfmt on generated sources:\nstdout:{stdout}\nstderr:{stderr}",
+            stdout = String::from_utf8_lossy(&output.stdout),
+            stderr = String::from_utf8_lossy(&output.stderr)
+        );
+    }
+}
+
 pub fn write_bin_cargo_toml(
     w: &mut impl std::io::Write,
     module_count: usize,
@@ -106,7 +123,7 @@ pub fn write_lib_rs<T: IntrinsicTypeDefinition>(
                 let name = arg.rust_vals_array_name().to_string();
 
                 if seen.insert(name) {
-                    ArgumentList::gen_arg_rust(arg, w, Indentation::default(), PASSES)?;
+                    ArgumentList::gen_arg_rust(arg, w, PASSES)?;
                 }
             }
         }
@@ -205,9 +222,7 @@ fn generate_rust_test_loop<T: IntrinsicTypeDefinition>(
             "        }}",
             "    }}",
         ),
-        loaded_args = intrinsic
-            .arguments
-            .load_values_rust(Indentation::default().nest_by(4)),
+        loaded_args = intrinsic.arguments.load_values_rust(),
         rust_args = intrinsic.arguments.as_call_param_rust(),
         c_args = intrinsic.arguments.as_c_call_param_rust(),
         passes = passes,
@@ -287,9 +302,8 @@ pub fn write_build_rs(
         i = i
     )?;
 
-    let indentation = Indentation::default().nest_by(2);
     for flag in COMMON_FLAGS.iter().chain(arch_flags) {
-        writeln!(w, "{indentation}\"{flag}\",")?;
+        writeln!(w, "\"{flag}\",")?;
     }
 
     write!(
diff --git a/library/stdarch/crates/intrinsic-test/src/common/indentation.rs b/library/stdarch/crates/intrinsic-test/src/common/indentation.rs
deleted file mode 100644
index 9c2cc886e654..000000000000
--- a/library/stdarch/crates/intrinsic-test/src/common/indentation.rs
+++ /dev/null
@@ -1,26 +0,0 @@
-//! Basic code formatting tools.
-//!
-//! We don't need perfect formatting for the generated tests, but simple indentation can make
-//! debugging a lot easier.
-
-#[derive(Copy, Clone, Debug, Default)]
-pub struct Indentation(u32);
-
-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 {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        for _ in 0..self.0 {
-            write!(f, "    ")?;
-        }
-        Ok(())
-    }
-}
diff --git a/library/stdarch/crates/intrinsic-test/src/common/intrinsic_helpers.rs b/library/stdarch/crates/intrinsic-test/src/common/intrinsic_helpers.rs
index ab4a565200bc..9d09eff64538 100644
--- a/library/stdarch/crates/intrinsic-test/src/common/intrinsic_helpers.rs
+++ b/library/stdarch/crates/intrinsic-test/src/common/intrinsic_helpers.rs
@@ -5,7 +5,6 @@
 
 use itertools::Itertools as _;
 
-use super::indentation::Indentation;
 use super::values::value_for_array;
 
 #[derive(Debug, PartialEq, Copy, Clone)]
@@ -154,7 +153,7 @@ pub fn is_ptr(&self) -> bool {
         self.ptr
     }
 
-    pub fn populate_random(&self, indentation: Indentation, loads: u32) -> String {
+    pub fn populate_random(&self, loads: u32) -> String {
         match self {
             IntrinsicType {
                 bit_len: Some(bit_len @ (1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 16 | 32 | 64)),
@@ -164,9 +163,8 @@ pub fn populate_random(&self, indentation: Indentation, loads: u32) -> String {
                 vec_len,
                 ..
             } => {
-                let body_indentation = indentation.nested();
                 format!(
-                    "[\n{body}\n{indentation}]",
+                    "[\n{body}\n]",
                     body = (0..(simd_len.unwrap_or(1) * vec_len.unwrap_or(1) + loads - 1))
                         .format_with(",\n", |i, fmt| {
                             let src = value_for_array(*bit_len, i);
@@ -177,9 +175,9 @@ pub fn populate_random(&self, indentation: Indentation, loads: u32) -> String {
                                 let mask = !0u64 >> (64 - *bit_len);
                                 let ones_compl = src ^ mask;
                                 let twos_compl = ones_compl + 1;
-                                fmt(&format_args!("{body_indentation}-{twos_compl:#x}"))
+                                fmt(&format_args!("-{twos_compl:#x}"))
                             } else {
-                                fmt(&format_args!("{body_indentation}{src:#x}"))
+                                fmt(&format_args!("{src:#x}"))
                             }
                         })
                 )
@@ -192,11 +190,10 @@ pub fn populate_random(&self, indentation: Indentation, loads: u32) -> String {
                 ..
             } => {
                 format!(
-                    "[\n{body}\n{indentation}]",
+                    "[\n{body}\n]",
                     body = (0..(simd_len.unwrap_or(1) * vec_len.unwrap_or(1) + loads - 1))
                         .format_with(",\n", |i, fmt| fmt(&format_args!(
-                            "{indentation}f{bit_len}::from_bits({src:#x})",
-                            indentation = indentation.nested(),
+                            "f{bit_len}::from_bits({src:#x})",
                             src = value_for_array(*bit_len, i)
                         )))
                 )
@@ -208,10 +205,9 @@ pub fn populate_random(&self, indentation: Indentation, loads: u32) -> String {
                 vec_len,
                 ..
             } => {
-                let body_indentation = indentation.nested();
                 let effective_bit_len = 32;
                 format!(
-                    "[\n{body}\n{indentation}]",
+                    "[\n{body}\n]",
                     body = (0..(vec_len.unwrap_or(1) * simd_len.unwrap_or(1) + loads - 1))
                         .format_with(",\n", |i, fmt| {
                             let src = value_for_array(effective_bit_len, i);
@@ -221,9 +217,9 @@ pub fn populate_random(&self, indentation: Indentation, loads: u32) -> String {
                                 let mask = !0u64 >> (64 - effective_bit_len);
                                 let ones_compl = src ^ mask;
                                 let twos_compl = ones_compl + 1;
-                                fmt(&format_args!("{body_indentation}-{twos_compl:#x}"))
+                                fmt(&format_args!("-{twos_compl:#x}"))
                             } else {
-                                fmt(&format_args!("{body_indentation}{src:#x}"))
+                                fmt(&format_args!("{src:#x}"))
                             }
                         })
                 )
diff --git a/library/stdarch/crates/intrinsic-test/src/common/mod.rs b/library/stdarch/crates/intrinsic-test/src/common/mod.rs
index 86849f7db34e..86269bab338d 100644
--- a/library/stdarch/crates/intrinsic-test/src/common/mod.rs
+++ b/library/stdarch/crates/intrinsic-test/src/common/mod.rs
@@ -6,7 +6,9 @@
 
 use crate::common::{
     gen_c::write_wrapper_c,
-    gen_rust::{write_bin_cargo_toml, write_build_rs, write_lib_cargo_toml, write_lib_rs},
+    gen_rust::{
+        run_rustfmt, write_bin_cargo_toml, write_build_rs, write_lib_cargo_toml, write_lib_rs,
+    },
     intrinsic::Intrinsic,
     intrinsic_helpers::IntrinsicTypeDefinition,
 };
@@ -19,7 +21,6 @@
 
 mod gen_c;
 mod gen_rust;
-mod indentation;
 mod values;
 
 /// Architectures must support this trait
@@ -74,7 +75,7 @@ fn generate_rust_file(&self) {
 
                 let rust_filename = format!("rust_programs/mod_{i}/src/lib.rs");
                 trace!("generating `{rust_filename}`");
-                let mut file = File::create(rust_filename)?;
+                let mut file = File::create(&rust_filename)?;
 
                 write_lib_rs(
                     &mut file,
@@ -84,6 +85,7 @@ fn generate_rust_file(&self) {
                     i,
                     chunk,
                 )?;
+                run_rustfmt(&rust_filename);
 
                 let toml_filename = format!("rust_programs/mod_{i}/Cargo.toml");
                 trace!("generating `{toml_filename}`");
@@ -93,9 +95,10 @@ fn generate_rust_file(&self) {
 
                 let build_rs_filename = format!("rust_programs/mod_{i}/build.rs");
                 trace!("generating `{build_rs_filename}`");
-                let mut file = File::create(build_rs_filename).unwrap();
+                let mut file = File::create(&build_rs_filename).unwrap();
 
                 write_build_rs(&mut file, i, &arch_flags).unwrap();
+                run_rustfmt(&build_rs_filename);
 
                 Ok(())
             })