diff --git a/rule-tests_1_1_1.xsd b/rule-tests_1_1_1.xsd
new file mode 100644
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+++ b/rule-tests_1_1_1.xsd
@@ -0,0 +1,133 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Version 1.1.1 -->
+<!-- Last change: 2025-08-08 -->
+<!-- Changes against 1.1.0: allow empty expected-suppression (without suppressor children) -->
+<schema
+        xmlns="http://www.w3.org/2001/XMLSchema"
+        xmlns:tns="http://pmd.sourceforge.net/rule-tests"
+        targetNamespace="http://pmd.sourceforge.net/rule-tests"
+        elementFormDefault="qualified">
+
+    <element name="test-data">
+        <complexType>
+            <choice maxOccurs="unbounded">
+                <element name="test-code" minOccurs="0" maxOccurs="unbounded" type="tns:testType"/>
+                <element name="code-fragment" minOccurs="0" maxOccurs="unbounded" type="tns:codeFragmentType">
+                    <annotation>
+                        <documentation>
+                            A code fragment that can be referred to by several tests.
+                        </documentation>
+                    </annotation>
+                </element>
+            </choice>
+        </complexType>
+    </element>
+
+    <complexType name="testType">
+        <sequence>
+            <element name="description" type="string"/>
+            <element name="rule-property" minOccurs="0" maxOccurs="unbounded">
+                <complexType>
+                    <simpleContent>
+                        <extension base="string">
+                            <attribute name="name" type="string" use="required"/>
+                        </extension>
+                    </simpleContent>
+                </complexType>
+            </element>
+
+            <element name="expected-problems" type="nonNegativeInteger"/>
+            <element name="expected-linenumbers" type="string" minOccurs="0"/>
+            <element name="expected-messages" minOccurs="0">
+                <complexType>
+                    <sequence>
+                        <element name="message" type="string" maxOccurs="unbounded"/>
+                    </sequence>
+                </complexType>
+            </element>
+            <element name="expected-suppressions" minOccurs="0">
+                <annotation>
+                    <documentation>Declares the expected suppressed violations. Since PMD 7.15.0 / rule-tests 1.1.0.</documentation>
+                </annotation>
+                <complexType>
+                    <sequence>
+                        <element name="suppressor" minOccurs="0" maxOccurs="unbounded">
+                            <complexType>
+                                <simpleContent>
+                                    <extension base="string">
+                                        <attribute name="line" type="positiveInteger" use="required"/>
+                                    </extension>
+                                </simpleContent>
+                            </complexType>
+                        </element>
+                    </sequence>
+                </complexType>
+            </element>
+            <choice>
+                <element name="code" type="string"/>
+                <element name="code-ref">
+                    <complexType>
+                        <attribute name="id" type="IDREF" use="required"/>
+                    </complexType>
+                </element>
+            </choice>
+            <element name="source-type" minOccurs="0" default="" type="string">
+                <annotation>
+                    <documentation>
+                        Language version of the source, eg 'java 8'.
+                    </documentation>
+                </annotation>
+            </element>
+        </sequence>
+        <attribute name="reinitializeRule" type="boolean" default="true">
+            <annotation>
+                <documentation>
+                    This attribute is deprecated, it is assumed true and ignored.
+                </documentation>
+            </annotation>
+        </attribute>
+        <attribute name="regressionTest" type="boolean" default="true">
+            <annotation>
+                <documentation>
+                    This attribute is deprecated. Use "disabled" instead.
+                    If this attribute is set to "false", then the test is ignored.
+                </documentation>
+            </annotation>
+        </attribute>
+        <attribute name="useAuxClasspath" type="boolean" default="true">
+            <annotation>
+                <documentation>
+                    This attribute is deprecated, it is assumed true and ignored.
+                </documentation>
+            </annotation>
+        </attribute>
+
+        <attribute name="disabled" type="boolean" default="false">
+            <annotation>
+                <documentation>
+                    A reason why the test is disabled/ignored should be provided as a comment for the test.
+                </documentation>
+            </annotation>
+        </attribute>
+        <attribute name="focused" type="boolean" default="false">
+            <annotation>
+                <documentation>
+                    If true, only this test will be executed, and all others will be disabled.
+                    If several tests in the same file are focused, then the last one wins, in
+                    document order.
+                    This attribute is provided as a way for developers to temporarily focus on a single test.
+                    Test files with a focused test should not be checked in. For this reason,
+                    using this attribute produces a warning.
+                </documentation>
+            </annotation>
+        </attribute>
+    </complexType>
+
+    <complexType name="codeFragmentType">
+        <simpleContent>
+            <extension base="string">
+                <attribute name="id" type="ID" use="required"/>
+            </extension>
+        </simpleContent>
+    </complexType>
+</schema>