diff --git a/tests/Core/Ruleset/ExpandRulesetReferenceInternalIgnoreTest.xml b/tests/Core/Ruleset/ExpandRulesetReferenceInternalIgnoreTest.xml
index 9398e402b7..5e4a4602fb 100644
--- a/tests/Core/Ruleset/ExpandRulesetReferenceInternalIgnoreTest.xml
+++ b/tests/Core/Ruleset/ExpandRulesetReferenceInternalIgnoreTest.xml
@@ -10,6 +10,6 @@
     <!-- While this references a valid sniff category, it will be ignored anyway as the ref starts with "Internal". -->
     <rule ref="Internal.Valid"/>
 
-    <!-- Prevent a "no sniff were registered" error. -->
+    <!-- Prevent a "no sniffs were registered" error. -->
     <rule ref="Generic.PHP.BacktickOperator"/>
 </ruleset>
diff --git a/tests/Core/Ruleset/PopulateTokenListenersRegisterNoArrayTest.xml b/tests/Core/Ruleset/PopulateTokenListenersRegisterNoArrayTest.xml
index 52a406a699..5a48a456c3 100644
--- a/tests/Core/Ruleset/PopulateTokenListenersRegisterNoArrayTest.xml
+++ b/tests/Core/Ruleset/PopulateTokenListenersRegisterNoArrayTest.xml
@@ -5,6 +5,6 @@
 
     <rule ref="TestStandard.InvalidSniffs.RegisterNoArray"/>
 
-    <!-- Prevent a "no sniff were registered" error. -->
+    <!-- Prevent a "no sniffs were registered" error. -->
     <rule ref="Generic.PHP.BacktickOperator"/>
 </ruleset>
diff --git a/tests/Core/Ruleset/ProcessRulesetAutoloadFileNotFoundTest.xml b/tests/Core/Ruleset/ProcessRulesetAutoloadFileNotFoundTest.xml
index 196baa6cd9..d1bd2b2faa 100644
--- a/tests/Core/Ruleset/ProcessRulesetAutoloadFileNotFoundTest.xml
+++ b/tests/Core/Ruleset/ProcessRulesetAutoloadFileNotFoundTest.xml
@@ -3,6 +3,6 @@
 
     <autoload>./tests/Core/Ruleset/Fixtures/ThisFileDoesNotExist.php</autoload>
 
-    <!-- Prevent a "no sniff were registered" error. -->
+    <!-- Prevent a "no sniffs were registered" error. -->
     <rule ref="Generic.PHP.BacktickOperator"/>
 </ruleset>
diff --git a/tests/Core/Ruleset/ProcessRulesetAutoloadTest.xml b/tests/Core/Ruleset/ProcessRulesetAutoloadTest.xml
index 450de65079..85fc9bf61c 100644
--- a/tests/Core/Ruleset/ProcessRulesetAutoloadTest.xml
+++ b/tests/Core/Ruleset/ProcessRulesetAutoloadTest.xml
@@ -32,6 +32,6 @@
     <autoload phpcbf-only="true">./tests/Core/Ruleset/Fixtures/ProcessRulesetAutoloadLoadPhpcbfOnly.php</autoload>
 
 
-    <!-- Prevent a "no sniff were registered" error. -->
+    <!-- Prevent a "no sniffs were registered" error. -->
     <rule ref="Generic.PHP.BacktickOperator"/>
 </ruleset>
diff --git a/tests/Core/Ruleset/ProcessRulesetInvalidNoSniffsDirTest.xml b/tests/Core/Ruleset/ProcessRulesetInvalidNoSniffsDirTest.xml
index daa07f2e2a..f4aae34dab 100644
--- a/tests/Core/Ruleset/ProcessRulesetInvalidNoSniffsDirTest.xml
+++ b/tests/Core/Ruleset/ProcessRulesetInvalidNoSniffsDirTest.xml
@@ -5,6 +5,6 @@
 
     <rule ref="InvalidNoSniffsDir"/>
 
-    <!-- Prevent a "no sniff were registered" error. -->
+    <!-- Prevent a "no sniffs were registered" error. -->
     <rule ref="Generic.PHP.BacktickOperator"/>
 </ruleset>
diff --git a/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoProcessTest.xml b/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoProcessTest.xml
index 6b70d32d85..d12d435b64 100644
--- a/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoProcessTest.xml
+++ b/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoProcessTest.xml
@@ -3,6 +3,6 @@
 
     <rule ref="./tests/Core/Ruleset/Fixtures/TestStandard/Sniffs/InvalidSniffError/NoImplementsNoProcessSniff.php"/>
 
-    <!-- Prevent a "no sniff were registered" error. -->
+    <!-- Prevent a "no sniffs were registered" error. -->
     <rule ref="Generic.PHP.BacktickOperator"/>
 </ruleset>
diff --git a/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoRegisterOrProcessTest.xml b/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoRegisterOrProcessTest.xml
index 06e2028375..3f03d1a2ea 100644
--- a/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoRegisterOrProcessTest.xml
+++ b/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoRegisterOrProcessTest.xml
@@ -3,6 +3,6 @@
 
     <rule ref="./tests/Core/Ruleset/Fixtures/TestStandard/Sniffs/InvalidSniffError/NoImplementsNoRegisterOrProcessSniff.php"/>
 
-    <!-- Prevent a "no sniff were registered" error. -->
+    <!-- Prevent a "no sniffs were registered" error. -->
     <rule ref="Generic.PHP.BacktickOperator"/>
 </ruleset>
diff --git a/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoRegisterTest.xml b/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoRegisterTest.xml
index 9e0913f9cc..699628e232 100644
--- a/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoRegisterTest.xml
+++ b/tests/Core/Ruleset/RegisterSniffsRejectsInvalidSniffNoImplementsNoRegisterTest.xml
@@ -3,6 +3,6 @@
 
     <rule ref="./tests/Core/Ruleset/Fixtures/TestStandard/Sniffs/InvalidSniffError/NoImplementsNoRegisterSniff.php"/>
 
-    <!-- Prevent a "no sniff were registered" error. -->
+    <!-- Prevent a "no sniffs were registered" error. -->
     <rule ref="Generic.PHP.BacktickOperator"/>
 </ruleset>