1 files changed, 3 insertions, 1 deletions
diff --git a/tests/drivers/lsp_growth_test.js b/tests/drivers/lsp_growth_test.js
index b06230a..6d221fd 100644
--- a/tests/drivers/lsp_growth_test.js
+++ b/tests/drivers/lsp_growth_test.js
@@ -1,5 +1,7 @@
 // focused regressions for growing document, uri, hover, and name-set storage.
 // usage: node tests/drivers/lsp_growth_test.js path/to/zclsp-or-lsp.wasm
+// 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 cp = require('child_process');
 const { wasmProcess } = require('../../editors/vscode/client/wasmproc');
@@ -36,7 +38,7 @@ if (target.endsWith('.wasm')) {
     for (const message of messages) assert.ok(server.stdin.write(frame(message)));
     output = Buffer.concat(chunks);
 } else {
-    const result = cp.spawnSync(target, [], { input: Buffer.concat(messages.map(frame)), timeout: 30000, maxBuffer: 8 << 20 });
+    const result = cp.spawnSync(target, [], { input: Buffer.concat(messages.map(frame)), timeout: 30000 * TIMEOUT_SCALE, maxBuffer: 8 << 20 });
     assert.strictEqual(result.status, 0, String(result.stderr));
     output = result.stdout;
 }