diff --git a/maven-failsafe-plugin/src/main/java/org/apache/maven/plugin/failsafe/util/FailsafeSummaryXmlUtils.java b/maven-failsafe-plugin/src/main/java/org/apache/maven/plugin/failsafe/util/FailsafeSummaryXmlUtils.java
index ed39cc90ae..fac986b395 100644
--- a/maven-failsafe-plugin/src/main/java/org/apache/maven/plugin/failsafe/util/FailsafeSummaryXmlUtils.java
+++ b/maven-failsafe-plugin/src/main/java/org/apache/maven/plugin/failsafe/util/FailsafeSummaryXmlUtils.java
@@ -64,6 +64,7 @@ public final class FailsafeSummaryXmlUtils {
             + "    <errors>%d</errors>\n"
             + "    <failures>%d</failures>\n"
             + "    <skipped>%d</skipped>\n"
+            + "    <flakes>%d</flakes>\n"
             + "    %s\n"
             + "</failsafe-summary>";
 
@@ -84,12 +85,16 @@ public static RunResult toRunResult(File failsafeSummaryXml) throws Exception {
             String skipped = xpath.evaluate("/failsafe-summary/skipped", root);
             String failureMessage = xpath.evaluate("/failsafe-summary/failureMessage", root);
             String timeout = xpath.evaluate("/failsafe-summary/@timeout", root);
+            String flakes = xpath.evaluate("/failsafe-summary/flakes", root);
 
             return new RunResult(
                     parseInt(completed),
                     parseInt(errors),
                     parseInt(failures),
                     parseInt(skipped),
+                    // FIXME Backwards compatability: to be replaced with parseInt in a future release
+                    // synchronize with maven-surefire-plugin/src/site/resources/xsd/failsafe-summary.xsd
+                    isBlank(flakes) ? 0 : parseInt(flakes),
                     isBlank(failureMessage) ? null : unescapeXml(failureMessage),
                     parseBoolean(timeout));
         }
@@ -107,6 +112,7 @@ public static void fromRunResultToFile(RunResult fromRunResult, File toFailsafeS
                 fromRunResult.getErrors(),
                 fromRunResult.getFailures(),
                 fromRunResult.getSkipped(),
+                fromRunResult.getFlakes(),
                 msg);
 
         Files.write(
diff --git a/maven-failsafe-plugin/src/test/java/org/apache/maven/plugin/failsafe/RunResultTest.java b/maven-failsafe-plugin/src/test/java/org/apache/maven/plugin/failsafe/RunResultTest.java
index 1bd4145bc1..80d3eeaa41 100644
--- a/maven-failsafe-plugin/src/test/java/org/apache/maven/plugin/failsafe/RunResultTest.java
+++ b/maven-failsafe-plugin/src/test/java/org/apache/maven/plugin/failsafe/RunResultTest.java
@@ -19,12 +19,17 @@
 package org.apache.maven.plugin.failsafe;
 
 import java.io.File;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.StandardOpenOption;
+import java.util.Locale;
 
 import org.apache.maven.plugin.failsafe.util.FailsafeSummaryXmlUtils;
 import org.apache.maven.surefire.api.suite.RunResult;
 import org.apache.maven.surefire.api.util.SureFireFileManager;
 import org.junit.Test;
 
+import static java.lang.String.format;
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
@@ -64,6 +69,49 @@ public void testSkipped() throws Exception {
         writeReadCheck(new RunResult(3, 2, 1, 0, null, true));
     }
 
+    @Test
+    public void testFlakes() throws Exception {
+        writeReadCheck(new RunResult(3, 2, 1, 0, 2, null, true));
+    }
+
+    @Test
+    public void testLegacyDeserialization() throws Exception {
+        File legacySummary = SureFireFileManager.createTempFile("failsafe", "test");
+        String legacyFailsafeSummaryXmlTemplate = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
+                + "<failsafe-summary xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\""
+                + " xsi:noNamespaceSchemaLocation=\"https://maven.apache.org/surefire/maven-surefire-plugin/xsd/failsafe-summary.xsd\""
+                + " result=\"%s\" timeout=\"%s\">\n"
+                + "    <completed>%d</completed>\n"
+                + "    <errors>%d</errors>\n"
+                + "    <failures>%d</failures>\n"
+                + "    <skipped>%d</skipped>\n"
+                + "    %s\n"
+                + "</failsafe-summary>";
+        String xml = format(Locale.ROOT, legacyFailsafeSummaryXmlTemplate, 0, false, 3, 2, 1, 0, "msg");
+        Files.write(
+                legacySummary.toPath(),
+                xml.getBytes(StandardCharsets.UTF_8),
+                StandardOpenOption.CREATE,
+                StandardOpenOption.TRUNCATE_EXISTING,
+                StandardOpenOption.WRITE);
+
+        // When the failsafe-summary.xml does not contain the <flakes> element, it should be considered as 0.
+        RunResult expected = new RunResult(3, 2, 1, 0, 0, null, false);
+        RunResult actual = FailsafeSummaryXmlUtils.toRunResult(legacySummary);
+
+        assertThat(actual.getCompletedCount()).isEqualTo(expected.getCompletedCount());
+
+        assertThat(actual.getErrors()).isEqualTo(expected.getErrors());
+
+        assertThat(actual.getFailures()).isEqualTo(expected.getFailures());
+
+        assertThat(actual.getSkipped()).isEqualTo(expected.getSkipped());
+
+        assertThat(actual.getFlakes()).isEqualTo(expected.getFlakes());
+
+        assertThat(actual).isEqualTo(expected);
+    }
+
     @Test
     public void testAppendSerialization() throws Exception {
         RunResult simpleAggregate = getSimpleAggregate();
diff --git a/maven-surefire-plugin/src/site/resources/xsd/failsafe-summary.xsd b/maven-surefire-plugin/src/site/resources/xsd/failsafe-summary.xsd
index c412ec59e9..b81565234b 100644
--- a/maven-surefire-plugin/src/site/resources/xsd/failsafe-summary.xsd
+++ b/maven-surefire-plugin/src/site/resources/xsd/failsafe-summary.xsd
@@ -25,6 +25,7 @@
         <xsd:element name="errors" type="xsd:int"/>
         <xsd:element name="failures" type="xsd:int"/>
         <xsd:element name="skipped" type="xsd:int"/>
+        <xsd:element name="flakes" type="xsd:int" minOccurs="0"/>
         <xsd:element name="failureMessage" type="xsd:string" nillable="true"/>
       </xsd:sequence>
       <xsd:attribute name="result" type="errorType" use="optional"/>
diff --git a/surefire-api/src/main/java/org/apache/maven/surefire/api/suite/RunResult.java b/surefire-api/src/main/java/org/apache/maven/surefire/api/suite/RunResult.java
index 8be1df1d04..545e7ab447 100644
--- a/surefire-api/src/main/java/org/apache/maven/surefire/api/suite/RunResult.java
+++ b/surefire-api/src/main/java/org/apache/maven/surefire/api/suite/RunResult.java
@@ -202,6 +202,9 @@ public boolean equals(Object o) {
         if (skipped != runResult.skipped) {
             return false;
         }
+        if (flakes != runResult.flakes) {
+            return false;
+        }
         if (timeout != runResult.timeout) {
             return false;
         }
@@ -218,6 +221,7 @@ public int hashCode() {
         result = 31 * result + errors;
         result = 31 * result + failures;
         result = 31 * result + skipped;
+        result = 31 * result + flakes;
         result = 31 * result + (failure != null ? failure.hashCode() : 0);
         result = 31 * result + (timeout ? 1 : 0);
         return result;