diff --git a/src/Stores/CertificateStore.php b/src/Stores/CertificateStore.php
index 6bd32a4..48d72cb 100644
--- a/src/Stores/CertificateStore.php
+++ b/src/Stores/CertificateStore.php
@@ -47,8 +47,12 @@ class CertificateStore {
                 $chain = \array_slice($certificates, 1);
                 $path = $this->root . '/' . $commonName;
 
-                if (!(yield File\isdir($path)) && !(yield File\mkdir($path, 0644, true)) && !(yield File\isdir($path))) {
-                    throw new FilesystemException("Couldn't create certificate directory: '{$path}'");
+                if (!yield File\isdir($path)) {
+                    yield File\mkdir($path, 0644, true);
+
+                    if (!yield File\isdir($path)) {
+                        throw new FilesystemException("Couldn't create certificate directory: '{$path}'");
+                    }
                 }
 
                 yield File\put($path . '/cert.pem', $certificates[0]);
diff --git a/src/Stores/ChallengeStore.php b/src/Stores/ChallengeStore.php
index 766891b..ec1a5ec 100644
--- a/src/Stores/ChallengeStore.php
+++ b/src/Stores/ChallengeStore.php
@@ -22,8 +22,12 @@ class ChallengeStore {
                 throw new ChallengeStoreException("Document root doesn't exist: '{$this->docroot}'");
             }
 
-            if (!(yield File\isdir($path)) && !(yield File\mkdir($path, 0644, true)) && !(yield File\isdir($path))) {
-                throw new ChallengeStoreException("Couldn't create key directory: '{$path}'");
+            if (!yield File\isdir($path)) {
+                yield File\mkdir($path, 0644, true);
+
+                if (!yield File\isdir($path)) {
+                    throw new ChallengeStoreException("Couldn't create key directory: '{$path}'");
+                }
             }
 
             if ($user && !$userInfo = \posix_getpwnam($user)) {
diff --git a/src/Stores/KeyStore.php b/src/Stores/KeyStore.php
index e66ed5d..859283f 100644
--- a/src/Stores/KeyStore.php
+++ b/src/Stores/KeyStore.php
@@ -43,8 +43,12 @@ class KeyStore {
             try {
                 $dir = \dirname($file);
 
-                if (!(yield File\isdir($dir)) && !(yield File\mkdir($dir, 0644, true)) && !(yield File\isdir($dir))) {
-                    throw new FilesystemException("Couldn't create key directory: '{$dir}'");
+                if (!yield File\isdir($dir)) {
+                    yield File\mkdir($dir, 0644, true);
+
+                    if (!yield File\isdir($dir)) {
+                        throw new FilesystemException("Couldn't create key directory: '{$dir}'");
+                    }
                 }
 
                 yield File\put($file, $key->toPem());