diff --git a/composer.lock b/composer.lock
index b953e70c9..22981a039 100644
--- a/composer.lock
+++ b/composer.lock
@@ -8,16 +8,16 @@
     "packages": [
         {
             "name": "composer/ca-bundle",
-            "version": "1.2.10",
+            "version": "1.2.11",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/ca-bundle.git",
-                "reference": "9fdb22c2e97a614657716178093cd1da90a64aa8"
+                "reference": "0b072d51c5a9c6f3412f7ea3ab043d6603cb2582"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/9fdb22c2e97a614657716178093cd1da90a64aa8",
-                "reference": "9fdb22c2e97a614657716178093cd1da90a64aa8",
+                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/0b072d51c5a9c6f3412f7ea3ab043d6603cb2582",
+                "reference": "0b072d51c5a9c6f3412f7ea3ab043d6603cb2582",
                 "shasum": ""
             },
             "require": {
@@ -29,7 +29,7 @@
                 "phpstan/phpstan": "^0.12.55",
                 "psr/log": "^1.0",
                 "symfony/phpunit-bridge": "^4.2 || ^5",
-                "symfony/process": "^2.5 || ^3.0 || ^4.0 || ^5.0"
+                "symfony/process": "^2.5 || ^3.0 || ^4.0 || ^5.0 || ^6.0"
             },
             "type": "library",
             "extra": {
@@ -64,7 +64,7 @@
             "support": {
                 "irc": "irc://irc.freenode.org/composer",
                 "issues": "https://github.com/composer/ca-bundle/issues",
-                "source": "https://github.com/composer/ca-bundle/tree/1.2.10"
+                "source": "https://github.com/composer/ca-bundle/tree/1.2.11"
             },
             "funding": [
                 {
@@ -80,7 +80,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-06-07T13:58:28+00:00"
+            "time": "2021-09-25T20:32:43+00:00"
         },
         {
             "name": "composer/metadata-minifier",
diff --git a/tests/Composer/Test/Fixtures/installer/broken-deps-do-not-replace.test b/tests/Composer/Test/Fixtures/installer/broken-deps-do-not-replace.test
index c9a9dba6e..d947fd119 100644
--- a/tests/Composer/Test/Fixtures/installer/broken-deps-do-not-replace.test
+++ b/tests/Composer/Test/Fixtures/installer/broken-deps-do-not-replace.test
@@ -31,6 +31,7 @@ Your requirements could not be resolved to an installable set of packages.
     - Root composer.json requires b/b 1.* -> satisfiable by b/b[1.0.0].
 
 Potential causes:
+ - This package is not installable via Composer 1.x, see <https://blog.packagist.com/deprecating-composer-1-support/>
  - A typo in the package name
  - The package is not available in a stable-enough version according to your minimum-stability setting
    see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.
diff --git a/tests/Composer/Test/Fixtures/installer/solver-problems.test b/tests/Composer/Test/Fixtures/installer/solver-problems.test
index 83160893b..144c699f7 100644
--- a/tests/Composer/Test/Fixtures/installer/solver-problems.test
+++ b/tests/Composer/Test/Fixtures/installer/solver-problems.test
@@ -153,6 +153,7 @@ Your requirements could not be resolved to an installable set of packages.
     - Root composer.json requires package/found5 2.* -> satisfiable by package/found5[2.0.0].
 
 Potential causes:
+ - This package is not installable via Composer 1.x, see <https://blog.packagist.com/deprecating-composer-1-support/>
  - A typo in the package name
  - The package is not available in a stable-enough version according to your minimum-stability setting
    see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.