diff --git a/src/it/projects/no-overwrite-3.6.2-before/invoker.properties b/src/it/projects/no-overwrite-3.6.2-before/invoker.properties
new file mode 100644
index 00000000..40952ee2
--- /dev/null
+++ b/src/it/projects/no-overwrite-3.6.2-before/invoker.properties
@@ -0,0 +1,3 @@
+# .flattened-pom.xml contains xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+# xsd url changed to HTTPS in Maven 3.6.3 in https://issues.apache.org/jira/browse/MNG-6778
+invoker.maven.version = !3.6.3+
diff --git a/src/it/projects/no-overwrite-3.6.2-before/verify.groovy b/src/it/projects/no-overwrite-3.6.2-before/verify.groovy
index 633b6ad3..8096d0b9 100644
--- a/src/it/projects/no-overwrite-3.6.2-before/verify.groovy
+++ b/src/it/projects/no-overwrite-3.6.2-before/verify.groovy
@@ -16,21 +16,8 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-String os = System.getProperty("os.name");
-String[] mavenWords = os.contains("Windows") ? "mvnw.cmd -v".execute().text.split() : "./mvnw -v".execute().text.split()
-String mavenVersion = mavenWords[1] == "Maven" ? mavenWords[2] : mavenWords[3]
-String[] mavenVersionArray = mavenVersion.split("\\.")
-int[] versionArray = new int[3]
-for (int i = 0; i < 3; i++)
-    versionArray[i] = Integer.valueOf(mavenVersionArray[i])
-boolean isValid = versionArray[0] < 3\
- || versionArray[0] == 3 && versionArray[1] < 6\
- || versionArray[0] == 3 && versionArray[1] == 6 && versionArray[2] < 3
-if (isValid) {
-    File flattendPom = new File( basedir, '.flattened-pom.xml' )
-    assert flattendPom.exists()
-    long now = System.currentTimeMillis()
-    assert now - flattendPom.lastModified() > 20*1000
-}
-
 
+File flattendPom = new File( basedir, '.flattened-pom.xml' )
+assert flattendPom.exists()
+long now = System.currentTimeMillis()
+assert now - flattendPom.lastModified() > 20*1000
diff --git a/src/it/projects/no-overwrite-3.6.3-later/invoker.properties b/src/it/projects/no-overwrite-3.6.3-later/invoker.properties
new file mode 100644
index 00000000..e39bdef2
--- /dev/null
+++ b/src/it/projects/no-overwrite-3.6.3-later/invoker.properties
@@ -0,0 +1,3 @@
+# .flattened-pom.xml contains xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"
+# xsd url changed to HTTPS in Maven 3.6.3 in https://issues.apache.org/jira/browse/MNG-6778
+invoker.maven.version = 3.6.3+
diff --git a/src/it/projects/no-overwrite-3.6.3-later/verify.groovy b/src/it/projects/no-overwrite-3.6.3-later/verify.groovy
index 21417354..8096d0b9 100644
--- a/src/it/projects/no-overwrite-3.6.3-later/verify.groovy
+++ b/src/it/projects/no-overwrite-3.6.3-later/verify.groovy
@@ -17,21 +17,7 @@
  * under the License.
  */
 
-String os = System.getProperty("os.name").split()[0]
-String[] mavenWords = os.contains("Windows") ? "mvnw.cmd -v".execute().text.split() : "./mvnw -v".execute().text.split()
-String mavenVersion = mavenWords[1] == "Maven" ? mavenWords[2] : mavenWords[3]
-String[] mavenVersionArray = mavenVersion.split("\\.")
-int[] versionArray = new int[3]
-for (int i = 0; i < 3; i++)
-    versionArray[i] = Integer.valueOf(mavenVersionArray[i])
-boolean isValid = versionArray[0] > 3\
- || versionArray[0] == 3 && versionArray[1] > 6\
- || versionArray[0] == 3 && versionArray[1] == 6 && versionArray[2] >= 3
-if (isValid) {
-    File flattendPom = new File( basedir, '.flattened-pom.xml' )
-    assert flattendPom.exists()
-    long now = System.currentTimeMillis()
-    assert now - flattendPom.lastModified() > 20*1000
-}
-
-
+File flattendPom = new File( basedir, '.flattened-pom.xml' )
+assert flattendPom.exists()
+long now = System.currentTimeMillis()
+assert now - flattendPom.lastModified() > 20*1000