diff --git a/signer/Cargo.toml b/signer/Cargo.toml
index acc6e66890..90c11f6082 100644
--- a/signer/Cargo.toml
+++ b/signer/Cargo.toml
@@ -66,7 +66,7 @@ hmac = { workspace = true }
 zeroize = { workspace = true }
 bip39 = { workspace = true }
 bip32 = { workspace = true, features = ["alloc", "secp256k1"], optional = true }
-schnorrkel = { workspace = true, optional = true }
+schnorrkel = { workspace = true, optional = true, features = ["getrandom"] }
 secp256k1 = { workspace = true, optional = true, features = [
     "alloc",
     "recovery",
diff --git a/signer/wasm-tests/.gitignore b/signer/tests/no-std/.gitignore
similarity index 100%
rename from signer/wasm-tests/.gitignore
rename to signer/tests/no-std/.gitignore
diff --git a/signer/tests/no-std/Cargo.toml b/signer/tests/no-std/Cargo.toml
new file mode 100644
index 0000000000..b901e04dc3
--- /dev/null
+++ b/signer/tests/no-std/Cargo.toml
@@ -0,0 +1,24 @@
+[package]
+name = "nostd-tests"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.24"
+tracing-wasm = "0.2.1"
+console_error_panic_hook = "0.1.7"
+
+# This crate is not a part of the workspace, because we want to
+# enable the "web" feature here but don't want it enabled as part
+# of workspace builds. Also disable the "subxt" feature here because
+# we want to ensure it works in isolation of that.
+subxt-signer = { path = "../../", default-features = false, features = [
+    "sr25519",
+    "ecdsa",
+    "unstable-eth",
+] }
+
+# this shouldn't be needed, it's in workspace.exclude, but still
+# I get the complaint unless I add it...
+[workspace]
diff --git a/signer/tests/no-std/tests/no_std.rs b/signer/tests/no-std/tests/no_std.rs
new file mode 100644
index 0000000000..2feb8b7eb8
--- /dev/null
+++ b/signer/tests/no-std/tests/no_std.rs
@@ -0,0 +1,51 @@
+#[no_std]
+
+use subxt_signer::{ecdsa, eth, sr25519};
+
+// Run the tests by calling:
+//
+// ```text
+// cargo test
+// ```
+//
+// These are independent of any other package to ensure that nothing
+// else enabled the same feature flag that subxt-signer needs to work ok
+// (subxt seems to, for instance).
+
+#[test]
+fn sr25519_signing_works() {
+    let alice = sr25519::dev::alice();
+
+    // There's some non-determinism in the signing, so this ensures that
+    // the rand stuff is configured properly to run ok in wasm.
+    let signature = alice.sign(b"Hello there");
+    assert!(sr25519::verify(
+        &signature,
+        b"Hello there",
+        &alice.public_key()
+    ));
+}
+
+#[test]
+fn ecdsa_signing_works() {
+    let alice = ecdsa::dev::alice();
+
+    // There's some non-determinism in the signing, so this ensures that
+    // the rand stuff is configured properly to run ok in wasm.
+    let signature = alice.sign(b"Hello there");
+    assert!(ecdsa::verify(
+        &signature,
+        b"Hello there",
+        &alice.public_key()
+    ));
+}
+
+#[test]
+fn eth_signing_works() {
+    let alice = eth::dev::alith();
+
+    // There's some non-determinism in the signing, so this ensures that
+    // the rand stuff is configured properly to run ok in wasm.
+    let signature = alice.sign(b"Hello there");
+    assert!(eth::verify(&signature, b"Hello there", &alice.public_key()));
+}
diff --git a/signer/tests/wasm/.gitignore b/signer/tests/wasm/.gitignore
new file mode 100644
index 0000000000..869df07dae
--- /dev/null
+++ b/signer/tests/wasm/.gitignore
@@ -0,0 +1,2 @@
+/target
+Cargo.lock
\ No newline at end of file
diff --git a/signer/wasm-tests/Cargo.toml b/signer/tests/wasm/Cargo.toml
similarity index 89%
rename from signer/wasm-tests/Cargo.toml
rename to signer/tests/wasm/Cargo.toml
index f807f06b3f..3ee73f727b 100644
--- a/signer/wasm-tests/Cargo.toml
+++ b/signer/tests/wasm/Cargo.toml
@@ -13,7 +13,7 @@ console_error_panic_hook = "0.1.7"
 # enable the "web" feature here but don't want it enabled as part
 # of workspace builds. Also disable the "subxt" feature here because
 # we want to ensure it works in isolation of that.
-subxt-signer = { path = "..", default-features = false, features = [
+subxt-signer = { path = "../../", default-features = false, features = [
     "web",
     "sr25519",
     "ecdsa",
diff --git a/signer/wasm-tests/tests/wasm.rs b/signer/tests/wasm/tests/wasm.rs
similarity index 97%
rename from signer/wasm-tests/tests/wasm.rs
rename to signer/tests/wasm/tests/wasm.rs
index 667f20a55c..1051877225 100644
--- a/signer/wasm-tests/tests/wasm.rs
+++ b/signer/tests/wasm/tests/wasm.rs
@@ -8,7 +8,7 @@ wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);
 // Run the tests by calling:
 //
 // ```text
-// wasm-pack test --firefox --headless`
+// wasm-pack test --firefox --headless
 // ```
 //
 // These are independent of any other package to ensure that nothing
diff --git a/testing/no-std-tests/Cargo.lock b/testing/no-std-tests/Cargo.lock
index 4c2134b676..0eebf5545d 100644
--- a/testing/no-std-tests/Cargo.lock
+++ b/testing/no-std-tests/Cargo.lock
@@ -2,21 +2,6 @@
 # It is not intended for manual editing.
 version = 4
 
-[[package]]
-name = "addr2line"
-version = "0.21.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
-dependencies = [
- "gimli",
-]
-
-[[package]]
-name = "adler"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
-
 [[package]]
 name = "ahash"
 version = "0.8.11"
@@ -47,82 +32,36 @@ version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
 
-[[package]]
-name = "async-trait"
-version = "0.1.78"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "461abc97219de0eaaf81fe3ef974a540158f3d079c2ab200f891f1a2ef201e85"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.85",
-]
-
-[[package]]
-name = "atomic-waker"
-version = "1.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
-
-[[package]]
-name = "autocfg"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
-
-[[package]]
-name = "backtrace"
-version = "0.3.70"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95d8e92cac0961e91dbd517496b00f7e9b92363dbe6d42c3198268323798860c"
-dependencies = [
- "addr2line",
- "cc",
- "cfg-if",
- "libc",
- "miniz_oxide",
- "object",
- "rustc-demangle",
-]
-
 [[package]]
 name = "base58"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6107fe1be6682a68940da878d9e9f5e90ca5745b3dec9fd1bb393c8777d4f581"
 
-[[package]]
-name = "base64"
-version = "0.21.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
-
-[[package]]
-name = "base64"
-version = "0.22.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
-
 [[package]]
 name = "bip39"
-version = "2.0.0"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93f2635620bf0b9d4576eb7bb9a38a55df78bd1205d26fa994b25911a69f212f"
+checksum = "33415e24172c1b7d6066f6d999545375ab8e1d95421d6784bdfff9496f292387"
 dependencies = [
  "bitcoin_hashes",
 ]
 
 [[package]]
-name = "bitcoin_hashes"
-version = "0.11.0"
+name = "bitcoin-internals"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90064b8dee6815a6470d60bad07bbbaee885c0e12d04177138fa3291a01b7bc4"
+checksum = "9425c3bf7089c983facbae04de54513cce73b41c7f9ff8c845b54e7bc64ebbfb"
 
 [[package]]
-name = "bitflags"
-version = "2.6.0"
+name = "bitcoin_hashes"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
+checksum = "1930a4dabfebb8d7d9992db18ebe3ae2876f0a305fab206fd168df931ede293b"
+dependencies = [
+ "bitcoin-internals",
+ "hex-conservative",
+]
 
 [[package]]
 name = "bitvec"
@@ -177,62 +116,18 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
-[[package]]
-name = "bytes"
-version = "1.7.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "428d9aa8fbc0670b7b8d6030a7fadd0f86151cae55e4dbbece15f3780a3dfaf3"
-
-[[package]]
-name = "cc"
-version = "1.0.90"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8cd6604a82acf3039f1144f54b8eb34e91ffba622051189e71b781822d5ee1f5"
-
-[[package]]
-name = "cesu8"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d43a04d8753f35258c91f8ec639f792891f748a1edbd759cf1dcea3382ad83c"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
-[[package]]
-name = "combine"
-version = "4.6.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba5a308b75df32fe02788e748662718f03fde005016435c444eea572398219fd"
-dependencies = [
- "bytes",
- "memchr",
-]
-
 [[package]]
 name = "constant_time_eq"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f7144d30dcf0fafbce74250a3963025d8d52177934239851c917d29f1df280c2"
 
-[[package]]
-name = "core-foundation"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91e195e091a93c46f7102ec7818a2aa394e1e1771c3ab4825963fa03e45afb8f"
-dependencies = [
- "core-foundation-sys",
- "libc",
-]
-
-[[package]]
-name = "core-foundation-sys"
-version = "0.8.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06ea2b9bc92be3c2baa9334a323ebca2d6f074ff852cd1d7b11064035cd3868f"
-
 [[package]]
 name = "cpufeatures"
 version = "0.2.12"
@@ -260,16 +155,15 @@ dependencies = [
 
 [[package]]
 name = "curve25519-dalek"
-version = "4.1.2"
+version = "4.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a677b8922c94e01bdbb12126b0bc852f00447528dee1782229af9c720c3f348"
+checksum = "97fb8b7c4503de7d6ae7b42ab72a5a59857b4c937ec27a3d4539dba95b5ab2be"
 dependencies = [
  "cfg-if",
  "cpufeatures",
  "curve25519-dalek-derive",
  "digest",
  "fiat-crypto",
- "platforms",
  "rustc_version",
  "subtle",
  "zeroize",
@@ -283,7 +177,7 @@ checksum = "f46882e17999c6cc590af592290432be3bce0428cb0d5f8b6715e4dc7b383eb3"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.85",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -307,7 +201,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn 2.0.85",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -318,7 +212,7 @@ checksum = "d336a2a514f6ccccaa3e09b02d41d35330c07ddf03a62165fcec10bb561c7806"
 dependencies = [
  "darling_core",
  "quote",
- "syn 2.0.85",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -329,7 +223,7 @@ checksum = "62d671cc41a825ebabc75757b62d3d168c577f9149b2d49ece1dad1f72119d25"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.85",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -349,7 +243,7 @@ checksum = "cb7330aeadfbe296029522e6c40f315320aba36fc43a5b3632f3795348f3bd22"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.85",
+ "syn 2.0.87",
  "unicode-xid",
 ]
 
@@ -378,9 +272,9 @@ checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
 [[package]]
 name = "fiat-crypto"
-version = "0.2.7"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c007b1ae3abe1cb6f85a16305acd418b7ca6343b953633fee2b76d8f108b830f"
+checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
 
 [[package]]
 name = "fixed-hash"
@@ -397,15 +291,6 @@ version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
-[[package]]
-name = "form_urlencoded"
-version = "1.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e13624c2627564efccf4934284bdd98cbaa14e79b0b5a141218e507b3a823456"
-dependencies = [
- "percent-encoding",
-]
-
 [[package]]
 name = "frame-decode"
 version = "0.5.0"
@@ -414,7 +299,7 @@ checksum = "02d3379df61ff3dd871e2dde7d1bcdc0263e613c21c7579b149fd4f0ad9b1dc2"
 dependencies = [
  "frame-metadata",
  "parity-scale-codec",
- "scale-decode",
+ "scale-decode 0.14.0",
  "scale-info",
  "scale-type-resolver",
  "sp-crypto-hashing",
@@ -437,77 +322,6 @@ version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6d5a32815ae3f33302d95fdcb2ce17862f8c65363dcfd29360480ba1001fc9c"
 
-[[package]]
-name = "futures"
-version = "0.3.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "645c6916888f6cb6350d2550b80fb63e734897a8498abe35cfb732b6487804b0"
-dependencies = [
- "futures-channel",
- "futures-core",
- "futures-io",
- "futures-sink",
- "futures-task",
- "futures-util",
-]
-
-[[package]]
-name = "futures-channel"
-version = "0.3.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eac8f7d7865dcb88bd4373ab671c8cf4508703796caa2b1985a9ca867b3fcb78"
-dependencies = [
- "futures-core",
- "futures-sink",
-]
-
-[[package]]
-name = "futures-core"
-version = "0.3.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dfc6580bb841c5a68e9ef15c77ccc837b40a7504914d52e47b8b0e9bbda25a1d"
-
-[[package]]
-name = "futures-io"
-version = "0.3.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a44623e20b9681a318efdd71c299b6b222ed6f231972bfe2f224ebad6311f0c1"
-
-[[package]]
-name = "futures-sink"
-version = "0.3.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fb8e00e87438d937621c1c6269e53f536c14d3fbd6a042bb24879e57d474fb5"
-
-[[package]]
-name = "futures-task"
-version = "0.3.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38d84fa142264698cdce1a9f9172cf383a0c82de1bddcf3092901442c4097004"
-
-[[package]]
-name = "futures-timer"
-version = "3.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f288b0a4f20f9a56b5d1da57e2227c661b7b16168e2f72365f57b63326e29b24"
-
-[[package]]
-name = "futures-util"
-version = "0.3.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d6401deb83407ab3da39eba7e33987a73c3df0c82b4bb5813ee871c19c41d48"
-dependencies = [
- "futures-channel",
- "futures-core",
- "futures-io",
- "futures-sink",
- "futures-task",
- "memchr",
- "pin-project-lite",
- "pin-utils",
- "slab",
-]
-
 [[package]]
 name = "generic-array"
 version = "0.14.7"
@@ -518,17 +332,6 @@ dependencies = [
  "version_check",
 ]
 
-[[package]]
-name = "getrandom"
-version = "0.2.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "190092ea657667030ac6a35e305e62fc4dd69fd98ac98631e5d3a2b1575a12b5"
-dependencies = [
- "cfg-if",
- "libc",
- "wasi",
-]
-
 [[package]]
 name = "getrandom_or_panic"
 version = "0.0.3"
@@ -538,31 +341,6 @@ dependencies = [
  "rand_core",
 ]
 
-[[package]]
-name = "gimli"
-version = "0.28.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253"
-
-[[package]]
-name = "h2"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "524e8ac6999421f49a846c2d4411f337e53497d8ec55d67753beffa43c5d9205"
-dependencies = [
- "atomic-waker",
- "bytes",
- "fnv",
- "futures-core",
- "futures-sink",
- "http",
- "indexmap",
- "slab",
- "tokio",
- "tokio-util",
- "tracing",
-]
-
 [[package]]
 name = "hashbrown"
 version = "0.14.5"
@@ -579,12 +357,6 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
-[[package]]
-name = "hermit-abi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
-
 [[package]]
 name = "hex"
 version = "0.4.3"
@@ -592,109 +364,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
-name = "hmac"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
-dependencies = [
- "digest",
-]
-
-[[package]]
-name = "http"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
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-checksum = "41296eb09f183ac68eec06e03cdbea2e759633d4067b2f6552fc2e009bcad08b"
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 dependencies = [
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- "futures-channel",
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- "http",
- "http-body",
- "hyper",
- "pin-project-lite",
- "socket2",
- "tokio",
- "tower-service",
- "tracing",
+ "digest",
 ]
 
 [[package]]
@@ -703,16 +384,6 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
 
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@@ -758,122 +429,6 @@ version = "1.0.10"
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- "rustls-platform-verifier",
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- "hyper-util",
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- "jsonrpsee-types",
- "rustls",
- "rustls-platform-verifier",
- "serde",
- "serde_json",
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@@ -905,12 +460,6 @@ version = "1.0.7"
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-
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@@ -929,76 +478,12 @@ dependencies = [
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@@ -1034,50 +519,12 @@ dependencies = [
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-[[package]]
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@@ -1087,12 +534,6 @@ dependencies = [
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 ]
 
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-
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@@ -1134,14 +575,14 @@ dependencies = [
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  "proc-macro2",
  "quote",
- "syn 2.0.85",
+ "syn 2.0.87",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.86"
+version = "1.0.89"
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-checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
+checksum = "f139b0662de085916d1fb67d2b4169d1addddda1919e696f3252b740b629986e"
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@@ -1161,177 +602,44 @@ version = "0.7.0"
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 [[package]]
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+name = "regex"
+version = "1.11.0"
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+checksum = "38200e5ee88914975b69f657f0801b6f6dccafd44fd9326302a4aaeecfacb1d8"
+dependencies = [
+ "regex-automata",
+ "regex-syntax",
+]
 
 [[package]]
-name = "rustls-platform-verifier"
-version = "0.3.4"
+name = "regex-automata"
+version = "0.4.8"
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-checksum = "afbb878bdfdf63a336a5e63561b1835e7a8c91524f51621db870169eac84b490"
+checksum = "368758f23274712b504848e9d5a6f010445cc8b87a7cdb4d7cbee666c1288da3"
 dependencies = [
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- "rustls-platform-verifier-android",
- "rustls-webpki",
- "security-framework",
- "security-framework-sys",
- "webpki-roots",
- "winapi",
+ "regex-syntax",
 ]
 
 [[package]]
-name = "rustls-platform-verifier-android"
-version = "0.1.1"
+name = "regex-syntax"
+version = "0.8.5"
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-checksum = "f87165f0995f63a9fbeea62b64d10b4d9d8e78ec6d7d51fb2125fda7bb36788f"
+checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
 
 [[package]]
-name = "rustls-webpki"
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+name = "rustc_version"
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-checksum = "64ca1bc8749bd4cf37b5ce386cc146580777b4e8572c7b97baf22c83f444bee9"
+checksum = "cfcb3a22ef46e85b45de6ee7e79d063319ebb6594faafcf1c225ea92ab6e9b92"
 dependencies = [
- "ring",
- "rustls-pki-types",
- "untrusted",
+ "semver",
 ]
 
 [[package]]
@@ -1341,19 +649,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
 
 [[package]]
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+name = "scale-bits"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+checksum = "e57b1e7f6b65ed1f04e79a85a57d755ad56d76fdf1e9bddcc9ae14f71fcdcf54"
 dependencies = [
- "winapi-util",
+ "parity-scale-codec",
+ "scale-type-resolver",
 ]
 
 [[package]]
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@@ -1368,52 +677,65 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8ae9cc099ae85ff28820210732b00f019546f36f33225f509fe25d5816864a0"
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+ "scale-bits 0.6.0",
+ "scale-type-resolver",
+ "smallvec",
+]
+
+[[package]]
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+ "scale-bits 0.7.0",
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+ "thiserror",
 ]
 
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+ "syn 2.0.87",
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 dependencies = [
- "derive_more",
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+ "scale-bits 0.7.0",
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  "scale-type-resolver",
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+ "thiserror",
 ]
 
 [[package]]
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 dependencies = [
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+ "syn 2.0.87",
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 [[package]]
@@ -1439,7 +761,7 @@ dependencies = [
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- "syn 2.0.85",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -1454,40 +776,30 @@ dependencies = [
 
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 dependencies = [
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- "syn 2.0.85",
+ "syn 2.0.87",
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 [[package]]
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-checksum = "f5e0ef2a0ee1e02a69ada37feb87ea1616ce9808aca072befe2d3131bf28576e"
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 dependencies = [
- "derive_more",
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- "scale-bits",
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+ "scale-decode 0.16.0",
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-dependencies = [
- "windows-sys",
+ "thiserror",
 ]
 
 [[package]]
@@ -1516,35 +828,11 @@ dependencies = [
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-dependencies = [
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- "libc",
-]
-
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+version = "1.0.23"
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+checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
 
 [[package]]
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@@ -1563,7 +851,7 @@ checksum = "243902eda00fad750862fc144cea25caca5e20d615af0a81bee94ca738f1df1f"
 dependencies = [
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+ "syn 2.0.87",
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 [[package]]
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@@ -1610,46 +887,12 @@ dependencies = [
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@@ -1664,12 +907,6 @@ dependencies = [
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-
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  "scale-typegen",
  "subxt-metadata",
- "syn 2.0.85",
+ "syn 2.0.87",
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- "tokio",
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 [[package]]
@@ -1723,14 +956,15 @@ dependencies = [
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  "polkadot-sdk",
  "primitive-types",
- "scale-bits",
- "scale-decode",
+ "scale-bits 0.7.0",
+ "scale-decode 0.16.0",
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  "scale-info",
  "scale-value",
  "serde",
  "serde_json",
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+ "thiserror",
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 ]
 
@@ -1756,7 +990,8 @@ dependencies = [
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  "scale-typegen",
  "subxt-codegen",
- "syn 2.0.85",
+ "subxt-utils-fetchmetadata",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -1769,6 +1004,7 @@ dependencies = [
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  "polkadot-sdk",
  "scale-info",
+ "thiserror",
 ]
 
 [[package]]
@@ -1787,9 +1023,19 @@ dependencies = [
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  "sha2",
  "subxt-core",
+ "thiserror",
  "zeroize",
 ]
 
+[[package]]
+name = "subxt-utils-fetchmetadata"
+version = "0.38.0"
+dependencies = [
+ "hex",
+ "parity-scale-codec",
+ "thiserror",
+]
+
 [[package]]
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@@ -1803,9 +1049,9 @@ dependencies = [
 
 [[package]]
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+ "syn 2.0.87",
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 [[package]]
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 [[package]]
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@@ -1943,70 +1110,21 @@ dependencies = [
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 ]
 
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@@ -2037,187 +1155,24 @@ dependencies = [
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 ]
 
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- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
-]
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-
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-
 [[package]]
 name = "winnow"
 version = "0.6.20"
@@ -2253,7 +1208,7 @@ checksum = "9ce1b18ccd8e73a9321186f97e46f9f04b778851177567b1975109d26a08d2a6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.85",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -2273,5 +1228,5 @@ checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.85",
+ "syn 2.0.87",
 ]
diff --git a/testing/no-std-tests/Cargo.toml b/testing/no-std-tests/Cargo.toml
index a4c2e7f130..1ff9ce11bc 100644
--- a/testing/no-std-tests/Cargo.toml
+++ b/testing/no-std-tests/Cargo.toml
@@ -8,7 +8,7 @@ resolver = "2"
 [dependencies]
 subxt-metadata = { path = "../../metadata", default-features = false }
 subxt-core = { path = "../../core", default-features = false }
-subxt-signer = { path = "../../signer", default-features = false, features = ["subxt", "sr25519"] }
+subxt-signer = { path = "../../signer", default-features = false, features = ["subxt"] }
 subxt-macro = { path = "../../macro" }
 codec = { package = "parity-scale-codec", version = "3.6.9", default-features = false, features = ["derive"] }
 libc_alloc = { version = "1.0.6" }
diff --git a/testing/no-std-tests/src/main.rs b/testing/no-std-tests/src/main.rs
index 292b1b9576..e357e20ca5 100644
--- a/testing/no-std-tests/src/main.rs
+++ b/testing/no-std-tests/src/main.rs
@@ -42,21 +42,27 @@ fn compile_test() {
     const METADATA: &[u8] = include_bytes!("../../../artifacts/polkadot_metadata_small.scale");
     subxt_metadata::Metadata::decode(&mut &METADATA[..]).expect("should be valid metadata");
 
-    // Subxt Signer compiles:
-    use subxt_signer::sr25519;
-    let keypair = sr25519::dev::alice();
-    let message = b"Hello!";
-    let _signature = keypair.sign(message);
-    let _public_key = keypair.public_key();
+    // Subxt signer compiles (though nothing much works on this particular nostd target...):
+    use core::str::FromStr;
+    let _ = subxt_signer::SecretUri::from_str("//Alice/bar");
 
-    // Note: `ecdsa` is not compiling for the `thumbv7em-none-eabi` target.
+    // Note: sr25519 needs randomness, but `thumbv7em-none-eabi` isn't supported by
+    // `getrandom`, so we can't sign in nostd on this target.
+    //
+    // use subxt_signer::sr25519;
+    // let keypair = sr25519::dev::alice();
+    // let message = b"Hello!";
+    // let _signature = keypair.sign(message);
+    // let _public_key = keypair.public_key();
+
+    // Note: `ecdsa` is also not compiling for the `thumbv7em-none-eabi` target owing to
+    // an issue compiling `secp256k1-sys`.
     //
     // use subxt_signer::ecdsa;
     // let keypair = ecdsa::dev::alice();
     // let message = b"Hello!";
     // let _signature = keypair.sign(message);
     // let _public_key = keypair.public_key();
-    //
 
     // Subxt Core compiles:
     let _era = subxt_core::utils::Era::Immortal;