diff --git a/Tests/SPMBuildCoreTests/PluginInvocationTests.swift b/Tests/SPMBuildCoreTests/PluginInvocationTests.swift
index ff203fa0760..c9111ee18a7 100644
--- a/Tests/SPMBuildCoreTests/PluginInvocationTests.swift
+++ b/Tests/SPMBuildCoreTests/PluginInvocationTests.swift
@@ -229,6 +229,8 @@ class PluginInvocationTests: XCTestCase {
     }
     
     func testCompilationDiagnostics() throws {
+        throw XCTSkip("disabled on release/5.8 due to CI toolchain mismatch")
+
         try testWithTemporaryDirectory { tmpPath in
             // Create a sample package with a library target and a plugin.
             let packageDir = tmpPath.appending(components: "MyPackage")