diff --git a/test/cryfs-cli/CliTest_IntegrityCheck.cpp b/test/cryfs-cli/CliTest_IntegrityCheck.cpp
index 8a41d18f..71ad4b49 100644
--- a/test/cryfs-cli/CliTest_IntegrityCheck.cpp
+++ b/test/cryfs-cli/CliTest_IntegrityCheck.cpp
@@ -89,7 +89,7 @@ TEST_F(CliTest_IntegrityCheck, givenIncorrectFilesystemId_thenFails) {
   modifyFilesystemId();
   EXPECT_RUN_ERROR(
       args,
-      "Error: The filesystem id in the config file is different to the last time we loaded a filesystem from this basedir.",
+      "Error 20: The filesystem id in the config file is different to the last time we loaded a filesystem from this basedir.",
       ErrorCode::FilesystemIdChanged
   );
 }
@@ -101,7 +101,7 @@ TEST_F(CliTest_IntegrityCheck, givenIncorrectFilesystemKey_thenFails) {
   modifyFilesystemKey();
   EXPECT_RUN_ERROR(
       args,
-      "Error: The filesystem encryption key differs from the last time we loaded this filesystem. Did an attacker replace the file system?",
+      "Error 21: The filesystem encryption key differs from the last time we loaded this filesystem. Did an attacker replace the file system?",
       ErrorCode::EncryptionKeyChanged
   );
 }