diff --git a/Cargo.lock b/Cargo.lock
index 3177872db..99474a6e7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -118,7 +118,6 @@ dependencies = [
  "rsconf",
  "serial_test",
  "widestring",
- "widestring-suffix",
 ]
 
 [[package]]
@@ -485,15 +484,6 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "653f141f39ec16bba3c5abe400a0c60da7468261cc2cbf36805022876bc721a8"
 
-[[package]]
-name = "widestring-suffix"
-version = "0.1.0"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
diff --git a/Cargo.toml b/Cargo.toml
index b1b68749f..df213a9f0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,6 @@
 [workspace]
 resolver = "2"
 members = [
-    "widestring-suffix",
 ]
 
 [workspace.package]
@@ -18,7 +17,6 @@ edition.workspace = true
 rust-version.workspace = true
 
 [dependencies]
-widestring-suffix = { path = "widestring-suffix/" }
 pcre2 = { git = "https://github.com/fish-shell/rust-pcre2", branch = "master", default-features = false, features = ["utf32"] }
 fast-float = { git = "https://github.com/fish-shell/fast-float-rust", branch="fish" }
 hexponent = { git = "https://github.com/fish-shell/hexponent", branch="fish" }
diff --git a/cmake/Tests.cmake b/cmake/Tests.cmake
index c53f31c72..435b5507e 100644
--- a/cmake/Tests.cmake
+++ b/cmake/Tests.cmake
@@ -166,10 +166,3 @@ add_test(
 )
 set_tests_properties("cargo-test" PROPERTIES SKIP_RETURN_CODE ${SKIP_RETURN_CODE})
 add_test_target("cargo-test")
-
-add_test(
-    NAME "cargo-test-widestring"
-    COMMAND env ${VARS_FOR_CARGO} cargo test ${CARGO_FLAGS} --package widestring-suffix --target-dir ${rust_target_dir} ${cargo_test_flags}
-    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
-)
-add_test_target("cargo-test-widestring")