diff --git a/.config/nextest.toml b/.config/nextest.toml
index 64b3b84cb..32c8d09d9 100644
--- a/.config/nextest.toml
+++ b/.config/nextest.toml
@@ -6,6 +6,10 @@ slow-timeout = { period = "45s", terminate-after = 2 }
 fail-fast = false
 retries = 0
 
+[profile.default-miri]
+# Miri is very very slow, so give it a much longer timeout.
+slow-timeout = { period = "120s", terminate-after = 4 }
+
 # Use two threads for tests with "2 threads" in their name
 [[profile.default.overrides]]
 filter = 'test(~2_threads) | test(~2 threads)'
diff --git a/naga/tests/naga/example_wgsl.rs b/naga/tests/naga/example_wgsl.rs
index 5edb39af8..d9c642a1c 100644
--- a/naga/tests/naga/example_wgsl.rs
+++ b/naga/tests/naga/example_wgsl.rs
@@ -4,6 +4,9 @@ use naga::{front::wgsl, valid::Validator};
 use std::{ffi::OsStr, fs, path::Path};
 
 /// Runs through all example shaders and ensures they are valid wgsl.
+// While we _can_ run this test under miri, it is extremely slow (>5 minutes),
+// and naga isn't the primary target for miri testing, so we disable it.
+#[cfg(not(miri))]
 #[test]
 pub fn parse_example_wgsl() {
     let example_path = Path::new(env!("CARGO_MANIFEST_DIR"))
diff --git a/naga/tests/naga/snapshots.rs b/naga/tests/naga/snapshots.rs
index e6e848deb..37a068d27 100644
--- a/naga/tests/naga/snapshots.rs
+++ b/naga/tests/naga/snapshots.rs
@@ -818,7 +818,9 @@ fn write_output_wgsl(
     input.write_output_file("wgsl", "wgsl", string);
 }
 
-#[cfg(feature = "wgsl-in")]
+// While we _can_ run this test under miri, it is extremely slow (>5 minutes),
+// and naga isn't the primary target for miri testing, so we disable it.
+#[cfg(all(feature = "wgsl-in", not(miri)))]
 #[test]
 fn convert_snapshots_wgsl() {
     let _ = env_logger::try_init();
@@ -843,7 +845,8 @@ fn convert_snapshots_wgsl() {
     }
 }
 
-#[cfg(feature = "spv-in")]
+// miri doesn't allow us to shell out to `spirv-as`
+#[cfg(all(feature = "spv-in", not(miri)))]
 #[test]
 fn convert_snapshots_spv() {
     use std::process::Command;
@@ -892,7 +895,9 @@ fn convert_snapshots_spv() {
     }
 }
 
-#[cfg(feature = "glsl-in")]
+// While we _can_ run this test under miri, it is extremely slow (>5 minutes),
+// and naga isn't the primary target for miri testing, so we disable it.
+#[cfg(all(feature = "glsl-in", not(miri)))]
 #[allow(unused_variables)]
 #[test]
 fn convert_snapshots_glsl() {
diff --git a/player/tests/player/main.rs b/player/tests/player/main.rs
index aa5eb90e7..ca0e728ae 100644
--- a/player/tests/player/main.rs
+++ b/player/tests/player/main.rs
@@ -245,6 +245,7 @@ impl Corpus {
     }
 }
 
+#[cfg(not(miri))]
 #[test]
 fn test_api() {
     env_logger::init();
diff --git a/tests/Cargo.toml b/tests/Cargo.toml
index d93f73389..95301df94 100644
--- a/tests/Cargo.toml
+++ b/tests/Cargo.toml
@@ -67,9 +67,11 @@ trybuild.workspace = true
 # Cargo-metadata doesn't compile on wasm due to old cargo-util-schemas dependency.
 cargo_metadata.workspace = true
 env_logger.workspace = true
-nv-flip.workspace = true
 parking_lot = { workspace = true, features = ["deadlock_detection"] }
 
+[target.'cfg(not(any(target_arch = "wasm32", miri)))'.dependencies]
+nv-flip.workspace = true
+
 # Webassembly
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 console_log.workspace = true
diff --git a/tests/src/image.rs b/tests/src/image.rs
index dee861b22..5cb66a647 100644
--- a/tests/src/image.rs
+++ b/tests/src/image.rs
@@ -7,7 +7,7 @@ use wgpu::*;
 
 use crate::TestingContext;
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(not(any(target_arch = "wasm32", miri)))]
 async fn read_png(path: impl AsRef<Path>, width: u32, height: u32) -> Option<Vec<u8>> {
     let data = match std::fs::read(&path) {
         Ok(f) => f,
@@ -45,7 +45,7 @@ async fn read_png(path: impl AsRef<Path>, width: u32, height: u32) -> Option<Vec
     Some(buffer)
 }
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(not(any(target_arch = "wasm32", miri)))]
 async fn write_png(
     path: impl AsRef<Path>,
     width: u32,
@@ -64,7 +64,7 @@ async fn write_png(
     writer.write_image_data(data).unwrap();
 }
 
-#[cfg_attr(target_arch = "wasm32", allow(unused))]
+#[cfg_attr(any(target_arch = "wasm32", miri), allow(unused))]
 fn add_alpha(input: &[u8]) -> Vec<u8> {
     input
         .chunks_exact(3)
@@ -72,7 +72,7 @@ fn add_alpha(input: &[u8]) -> Vec<u8> {
         .collect()
 }
 
-#[cfg_attr(target_arch = "wasm32", allow(unused))]
+#[cfg_attr(any(target_arch = "wasm32", miri), allow(unused))]
 fn remove_alpha(input: &[u8]) -> Vec<u8> {
     input
         .chunks_exact(4)
@@ -81,7 +81,7 @@ fn remove_alpha(input: &[u8]) -> Vec<u8> {
         .collect()
 }
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(not(any(target_arch = "wasm32", miri)))]
 fn print_flip(pool: &mut nv_flip::FlipPool) {
     println!("\tMean: {:.6}", pool.mean());
     println!("\tMin Value: {:.6}", pool.min_value());
@@ -115,7 +115,7 @@ pub enum ComparisonType {
 }
 
 impl ComparisonType {
-    #[cfg(not(target_arch = "wasm32"))]
+    #[cfg(not(any(target_arch = "wasm32", miri)))]
     fn check(&self, pool: &mut nv_flip::FlipPool) -> bool {
         match *self {
             ComparisonType::Mean(v) => {
@@ -148,7 +148,7 @@ impl ComparisonType {
     }
 }
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(not(any(target_arch = "wasm32", miri)))]
 pub async fn compare_image_output(
     path: impl AsRef<Path> + AsRef<OsStr>,
     adapter_info: &wgpu::AdapterInfo,
@@ -250,7 +250,7 @@ pub async fn compare_image_output(
     }
 }
 
-#[cfg(target_arch = "wasm32")]
+#[cfg(any(target_arch = "wasm32", miri))]
 pub async fn compare_image_output(
     path: impl AsRef<Path> + AsRef<OsStr>,
     adapter_info: &wgpu::AdapterInfo,
@@ -259,13 +259,13 @@ pub async fn compare_image_output(
     test_with_alpha: &[u8],
     checks: &[ComparisonType],
 ) {
-    #[cfg(target_arch = "wasm32")]
+    #[cfg(any(target_arch = "wasm32", miri))]
     {
         let _ = (path, adapter_info, width, height, test_with_alpha, checks);
     }
 }
 
-#[cfg_attr(target_arch = "wasm32", allow(unused))]
+#[cfg_attr(any(target_arch = "wasm32", miri), allow(unused))]
 fn sanitize_for_path(s: &str) -> String {
     s.chars()
         .map(|ch| if ch.is_ascii_alphanumeric() { ch } else { '_' })
diff --git a/tests/tests/wgpu-compile/main.rs b/tests/tests/wgpu-compile/main.rs
index f35a0cd24..e435171c4 100644
--- a/tests/tests/wgpu-compile/main.rs
+++ b/tests/tests/wgpu-compile/main.rs
@@ -1,3 +1,4 @@
+#![cfg(not(miri))]
 // Tests that ensure that various constructs that should not compile do not compile.
 
 #[test]
diff --git a/tests/tests/wgpu-dependency/main.rs b/tests/tests/wgpu-dependency/main.rs
index baf3f1bde..ac96afdb0 100644
--- a/tests/tests/wgpu-dependency/main.rs
+++ b/tests/tests/wgpu-dependency/main.rs
@@ -1,6 +1,6 @@
 // Cargo-metadata doesn't compile on wasm due to old cargo-util-schemas dependency.
 // Since this test isn't dependent on the current architecture, we can just skip it on wasm without any issues.
-#![cfg(not(target_arch = "wasm32"))]
+#![cfg(not(any(target_arch = "wasm32", miri)))]
 
 use std::process::Command;
 
diff --git a/tests/tests/wgpu-validation/api/instance.rs b/tests/tests/wgpu-validation/api/instance.rs
index 4f30e9029..5385b71a2 100644
--- a/tests/tests/wgpu-validation/api/instance.rs
+++ b/tests/tests/wgpu-validation/api/instance.rs
@@ -1,5 +1,5 @@
 mod multi_instance {
-    #![cfg(not(target_arch = "wasm32"))]
+    #![cfg(not(any(target_arch = "wasm32", miri)))]
 
     async fn get() -> wgpu::Adapter {
         let adapter = {