diff --git a/speedtest/speedtest.py b/speedtest/speedtest.py
index 4d16bc2..ea1daa4 100644
--- a/speedtest/speedtest.py
+++ b/speedtest/speedtest.py
@@ -36,11 +36,14 @@ class Speedtest(commands.Cog):
         return "\n".join(text)
 
     async def run_speedtest(self) -> str | Any:
-        process = await asyncio.create_subprocess_exec(
-            "speedtest", "-f json", "--accept-license",
-            stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE
-        )
+        try:
+            process = await asyncio.create_subprocess_exec(
+                "speedtest", "-f json", "--accept-license",
+                stdout=subprocess.PIPE,
+                stderr=subprocess.PIPE
+            )
+        except FileNotFoundError:
+            return "Speedtest CLI is not installed."
         stdout, stderr = await process.communicate()
         if process.returncode != 0:
             return stderr.decode("utf-8")