diff --git a/apps/server/src/provider/acp/AcpRegistrySupport.test.ts b/apps/server/src/provider/acp/AcpRegistrySupport.test.ts
index a7cd5dc87eac1fb7e937702dc31a4acb926f36e3..b12b13e3a4efc737a6031004e66289479388c4f9 100644
--- a/apps/server/src/provider/acp/AcpRegistrySupport.test.ts
+++ b/apps/server/src/provider/acp/AcpRegistrySupport.test.ts
@@ -116,33 +116,9 @@ const makeFakeUvToolchain = Effect.fn("AcpRegistrySupport.test.makeFakeUvToolcha
   const logPath = path.join(rootDirectory, "uv.log");
   yield* fileSystem.makeDirectory(toolchainBin, { recursive: true });
   yield* fileSystem.writeFileString(logPath, "");
-  yield* fileSystem.writeFileString(
+  yield* fileSystem.copyFile(
+    yield* path.fromFileUrl(new URL("./testing/AcpRegistrySupport.uv.fixture.sh", import.meta.url)),
     uvPath,
-    [
-      "#!/bin/sh",
-      'printf \'%s\\n\' "$*" >> "$FAKE_UV_LOG"',
-      'tool_bin="${UV_TOOL_BIN_DIR:-$FAKE_UV_BIN}"',
-      'executable="$tool_bin/fast-agent"',
-      'printf "tool-dir=%s bin-dir=%s\\n" "$UV_TOOL_DIR" "$UV_TOOL_BIN_DIR" >> "$FAKE_UV_LOG"',
-      'if [ "$1" = "tool" ] && [ "$2" = "dir" ] && [ "$3" = "--bin" ]; then',
-      "  printf '%s\\n' \"$tool_bin\"",
-      "  exit 0",
-      "fi",
-      'if [ "$1" = "tool" ] && [ "$2" = "list" ]; then',
-      '  if [ -x "$executable" ]; then',
-      "    printf 'fast-agent-acp v0.10.1\\n- fast-agent\\n'",
-      "  fi",
-      "  exit 0",
-      "fi",
-      'if [ "$1" = "tool" ] && [ "$2" = "install" ] && [ "$3" = "--force" ]; then',
-      '  mkdir -p "$tool_bin"',
-      "  printf '#!/bin/sh\\n' > \"$executable\"",
-      '  chmod 755 "$executable"',
-      "  exit 0",
-      "fi",
-      "exit 64",
-      "",
-    ].join("\n"),
   );
   yield* fileSystem.chmod(uvPath, 0o755);
   return {
diff --git a/apps/server/src/provider/acp/testing/AcpRegistrySupport.uv.fixture.sh b/apps/server/src/provider/acp/testing/AcpRegistrySupport.uv.fixture.sh
new file mode 100755
index 0000000000000000000000000000000000000000..18a456c24d15fc58f5ec252a7bd82215aa16bf99
--- /dev/null
+++ b/apps/server/src/provider/acp/testing/AcpRegistrySupport.uv.fixture.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+printf '%s\n' "$*" >> "$FAKE_UV_LOG"
+tool_bin="${UV_TOOL_BIN_DIR:-$FAKE_UV_BIN}"
+executable="$tool_bin/fast-agent"
+printf "tool-dir=%s bin-dir=%s\n" "$UV_TOOL_DIR" "$UV_TOOL_BIN_DIR" >> "$FAKE_UV_LOG"
+if [ "$1" = "tool" ] && [ "$2" = "dir" ] && [ "$3" = "--bin" ]; then
+  printf '%s\n' "$tool_bin"
+  exit 0
+fi
+if [ "$1" = "tool" ] && [ "$2" = "list" ]; then
+  if [ -x "$executable" ]; then
+    printf 'fast-agent-acp v0.10.1\n- fast-agent\n'
+  fi
+  exit 0
+fi
+if [ "$1" = "tool" ] && [ "$2" = "install" ] && [ "$3" = "--force" ]; then
+  mkdir -p "$tool_bin"
+  printf '#!/bin/sh\n' > "$executable"
+  chmod 755 "$executable"
+  exit 0
+fi
+exit 64