diff --git a/MODULE.bazel b/MODULE.bazel
index 7bc50b19..e8616fb9 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -6,9 +6,9 @@ module(
 http_archive = use_repo_rule("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 # NB: update_cpp_jsonnet.sh looks for these.
-CPP_JSONNET_SHA256 = "c170422f8fe719e607f101232361fe7601e6304336e02ae47f25d2aa963b84ae"
+CPP_JSONNET_SHA256 = "11f93ddebd2255d6dcddfe73142ed6ce85715290d2b2f500effab7dfbdf4dd51"
 
-CPP_JSONNET_GITHASH = "833f18402b6b6a2da0b2fae75446a1e14b9116dd"
+CPP_JSONNET_GITHASH = "3a7b2a565827635615f8a9432d94941e2a827c70"
 
 CPP_JSONNET_RELEASE_VERSION = ""
 
diff --git a/cmd/jsonnetfmt/cmd.go b/cmd/jsonnetfmt/cmd.go
index 88420e31..55771699 100644
--- a/cmd/jsonnetfmt/cmd.go
+++ b/cmd/jsonnetfmt/cmd.go
@@ -246,10 +246,12 @@ func main() {
 			// Should already have been caught by processArgs.
 			panic("Internal error: expected at least one input file.")
 		}
+		changedFiles := false
 		for _, inputFile := range config.inputFiles {
 			outputFile := inputFile
+			inputIsStdin := inputFile == "-"
 			if config.inPlace {
-				if inputFile == "-" {
+				if inputIsStdin {
 					fmt.Fprintf(os.Stderr, "ERROR: cannot use --in-place with stdin\n")
 					os.Exit(1)
 				}
@@ -267,18 +269,24 @@ func main() {
 			}
 
 			if output != input {
+				changedFiles = true
 				if config.inPlace {
 					err := cmd.WriteOutputFile(output, outputFile, false)
 					if err != nil {
 						fmt.Fprintln(os.Stderr, err.Error())
 						os.Exit(1)
 					}
-				} else {
-					os.Exit(2)
+				}
+				if !config.filenameIsCode && !inputIsStdin {
+					fmt.Println(inputFile)
 				}
 			}
 		}
 
+		if changedFiles && config.test {
+			os.Exit(2)
+		}
+
 	} else {
 		if len(config.inputFiles) != 1 {
 			// Should already have been caught by processArgs.
diff --git a/cpp-jsonnet b/cpp-jsonnet
index 833f1840..3a7b2a56 160000
--- a/cpp-jsonnet
+++ b/cpp-jsonnet
@@ -1 +1 @@
-Subproject commit 833f18402b6b6a2da0b2fae75446a1e14b9116dd
+Subproject commit 3a7b2a565827635615f8a9432d94941e2a827c70