diff --git a/Cache/IO.lean b/Cache/IO.lean
index 1dcf6db24b7dd..f7bd11c8c0001 100644
--- a/Cache/IO.lean
+++ b/Cache/IO.lean
@@ -367,7 +367,8 @@ def unpackCache (hashMap : HashMap) (force : Bool) : CacheM Unit := do
     stdin.putStr <| Lean.Json.compress <| .arr config
     let exitCode ← child.wait
     if exitCode != 0 then throw <| IO.userError s!"leantar failed with error code {exitCode}"
-    IO.println s!"unpacked in {(← IO.monoMsNow) - now} ms"
+    IO.println s!"Unpacked in {(← IO.monoMsNow) - now} ms"
+    IO.println "Completed successfully!"
   else IO.println "No cache files to decompress"
 
 instance : Ord FilePath where
diff --git a/Cache/Requests.lean b/Cache/Requests.lean
index 27549970d4715..3e022f97e0853 100644
--- a/Cache/Requests.lean
+++ b/Cache/Requests.lean
@@ -75,7 +75,8 @@ def downloadFile (hash : UInt64) : IO Bool := do
     IO.FS.removeFile partPath
     pure false
 
-/-- Calls `curl` to download files from the server to `CACHEDIR` (`.cache`) -/
+/-- Call `curl` to download files from the server to `CACHEDIR` (`.cache`).
+Exit the process with exit code 1 if any files failed to download. -/
 def downloadFiles (hashMap : IO.HashMap) (forceDownload : Bool) (parallel : Bool) : IO Unit := do
   let hashMap ← if forceDownload then pure hashMap else hashMap.filterExists false
   let size := hashMap.size
@@ -139,6 +140,8 @@ def downloadFiles (hashMap : IO.HashMap) (forceDownload : Bool) (parallel : Bool
       IO.Process.exit 1
   else IO.println "No files to download"
 
+/-- Check if the project's `lean-toolchain` file matches mathlib's.
+Print and error and exit the process with error code 1 otherwise. -/
 def checkForToolchainMismatch : IO.CacheM Unit := do
   let mathlibToolchainFile := (← IO.mathlibDepPath) / "lean-toolchain"
   let downstreamToolchain ← IO.FS.readFile "lean-toolchain"
@@ -166,6 +169,8 @@ def getFiles (hashMap : IO.HashMap) (forceDownload forceUnpack parallel decompre
   downloadFiles hashMap forceDownload parallel
   if decompress then
     IO.unpackCache hashMap forceUnpack
+  else
+    IO.println "Downloaded all files successfully!"
 
 end Get