diff --git a/tests/fs/files.luau b/tests/fs/files.luau
index f9b2611..a49412e 100644
--- a/tests/fs/files.luau
+++ b/tests/fs/files.luau
@@ -9,35 +9,22 @@ local utils = require("./utils")
 fs.writeDir(TEMP_DIR_PATH)
 fs.writeDir(TEMP_ROOT_PATH)
 
--- Write both of our files with string and buffer contents
+-- Write both of our files
 
 fs.writeFile(TEMP_ROOT_PATH .. "/test_binary", utils.binaryBlob)
 fs.writeFile(TEMP_ROOT_PATH .. "/test_json.json", utils.jsonBlob)
 
-fs.writeFile(TEMP_ROOT_PATH .. "/test_binary_buf", buffer.fromstring(utils.binaryBlob))
-fs.writeFile(TEMP_ROOT_PATH .. "/test_json_buf.json", buffer.fromstring(utils.jsonBlob))
-
 -- Make sure reading the file we just
 -- wrote gets us back the original strings
 
 assert(
-	buffer.tostring(fs.readFile(TEMP_ROOT_PATH .. "/test_binary")) == utils.binaryBlob,
-	"(String) Binary file round-trip resulted in different strings"
+	fs.readFile(TEMP_ROOT_PATH .. "/test_binary") == utils.binaryBlob,
+	"Binary file round-trip resulted in different strings"
 )
 
 assert(
-	buffer.tostring(fs.readFile(TEMP_ROOT_PATH .. "/test_json.json")) == utils.jsonBlob,
-	"(String) JSON file round-trip resulted in different strings"
-)
-
-assert(
-	buffer.tostring(fs.readFile(TEMP_ROOT_PATH .. "/test_binary_buf")) == utils.binaryBlob,
-	"(Buffer) Binary file round-trip resulted in different strings"
-)
-
-assert(
-	buffer.tostring(fs.readFile(TEMP_ROOT_PATH .. "/test_json_buf.json")) == utils.jsonBlob,
-	"(Buffer) JSON file round-trip resulted in different strings"
+	fs.readFile(TEMP_ROOT_PATH .. "/test_json.json") == utils.jsonBlob,
+	"JSON file round-trip resulted in different strings"
 )
 
 -- Make sure file checks succeed but dir checks fail
diff --git a/tests/roblox/rbx-test-files b/tests/roblox/rbx-test-files
index 52f2c1a..655b5cc 160000
--- a/tests/roblox/rbx-test-files
+++ b/tests/roblox/rbx-test-files
@@ -1 +1 @@
-Subproject commit 52f2c1a686e7b67d996005eeddf63b97b170a741
+Subproject commit 655b5cc6a64024709d3662cc45ec4319c87de5a2
diff --git a/types/fs.luau b/types/fs.luau
index c042851..823f6f7 100644
--- a/types/fs.luau
+++ b/types/fs.luau
@@ -107,7 +107,7 @@ local fs = {}
 	@param path The path to the file to read
 	@return The contents of the file
 ]=]
-function fs.readFile(path: string): buffer
+function fs.readFile(path: string): string
 	return nil :: any
 end