diff --git a/spec/01-unit/04-prefix_handler_spec.lua b/spec/01-unit/04-prefix_handler_spec.lua
index 37369170a7a0..601b6eebc423 100644
--- a/spec/01-unit/04-prefix_handler_spec.lua
+++ b/spec/01-unit/04-prefix_handler_spec.lua
@@ -912,16 +912,16 @@ describe("NGINX conf compiler", function()
         assert.matches("wasm {.+shm_kv counters 10m;.+}", ngx_cfg({ wasm = true, nginx_wasm_shm_kv_counters="10m" }, debug))
       end)
       it("injects a general shm_kv", function()
-        assert.matches("wasm {.+shm_kv %* 10m;.+}", ngx_cfg({ wasm = true, nginx_wasm_shm_kv="10m" }, debug))
+        assert.matches("wasm {.+shm_kv %* 10m;.+}", ngx_cfg({ wasm = true, nginx_wasm_shm_kv = "10m" }, debug))
       end)
       it("injects multiple shm_kvs", function()
         assert.matches(
           "wasm {.+shm_kv cache 10m.+shm_kv counters 10m;.+shm_kv %* 5m;.+}",
           ngx_cfg({
             wasm = true,
-            nginx_wasm_shm_kv_cache="10m",
-            nginx_wasm_shm_kv_counters="10m",
-            nginx_wasm_shm_kv="5m",
+            nginx_wasm_shm_kv_cache = "10m",
+            nginx_wasm_shm_kv_counters = "10m",
+            nginx_wasm_shm_kv = "5m",
           }, debug)
         )
       end)