1 files changed, 3 insertions, 1 deletions
diff --git a/tests/drivers/core_lsp_test.js b/tests/drivers/core_lsp_test.js
index 983f9aa..c3c01aa 100644
--- a/tests/drivers/core_lsp_test.js
+++ b/tests/drivers/core_lsp_test.js
@@ -1,4 +1,6 @@
 // check maintained zc sources through the editor document protocol, one file at a time.
+// interpreted hosts (no jit) are far slower; ZC_TEST_TIMEOUT_SCALE stretches every deadline
+const TIMEOUT_SCALE = Number(process.env.ZC_TEST_TIMEOUT_SCALE) || 1;
 const assert = require('assert');
 const fs = require('fs');
 const cp = require('child_process');
@@ -23,7 +25,7 @@ for (const file of files) {
         { jsonrpc: '2.0', id: 3, method: 'shutdown', params: null },
         { jsonrpc: '2.0', method: 'exit' },
     ];
-    const result = cp.spawnSync(target, [], { input: Buffer.concat(messages.map(frame)), timeout: 30000, maxBuffer: 32 << 20 });
+    const result = cp.spawnSync(target, [], { input: Buffer.concat(messages.map(frame)), timeout: 30000 * TIMEOUT_SCALE, maxBuffer: 32 << 20 });
     assert.strictEqual(result.status, 0, file + ': ' + result.stderr);
     let data = result.stdout;
     const replies = [];