From 11253c9068e713bfb84fe54bce57df5710b26409 Mon Sep 17 00:00:00 2001
From: Kavon Farvardin <kfarvardin@apple.com>
Date: Wed, 5 Nov 2025 10:49:13 -0800
Subject: [PATCH] CI: run Test-SourceKitLSP tests serially to workaround
 instability

---
 utils/build.ps1 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/utils/build.ps1 b/utils/build.ps1
index de67a1c80bd3..8345a6bdf5f7 100644
--- a/utils/build.ps1
+++ b/utils/build.ps1
@@ -3924,8 +3924,9 @@ function Test-SourceKitLSP {
     # Tell the tests where to find the just-built plugins.
     $env:SOURCEKIT_LSP_TEST_PLUGIN_PATHS="$($HostPlatform.ToolchainInstallRoot)\usr\lib"
 
+    # FIXME: TestParallel has issues: https://github.com/swiftlang/swift/issues/85337
     Build-SPMProject `
-      -Action TestParallel `
+      -Action Test `
       -Src "$SourceCache\sourcekit-lsp" `
       -Bin "$BinaryCache\$($HostPlatform.Triple)\SourceKitLSPTests" `
       -Platform $BuildPlatform `