diff --git a/org.eclipse.jgit.ant.test/pom.xml b/org.eclipse.jgit.ant.test/pom.xml
index cdf88e782..0ba52d47c 100644
--- a/org.eclipse.jgit.ant.test/pom.xml
+++ b/org.eclipse.jgit.ant.test/pom.xml
@@ -105,7 +105,7 @@
       <plugin>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <argLine>@{argLine} -Xmx256m -Dfile.encoding=UTF-8 -Djava.io.tmpdir=${project.build.directory}</argLine>
+          <argLine>@{argLine} -Xmx512m -Dfile.encoding=UTF-8 -Djava.io.tmpdir=${project.build.directory}</argLine>
         </configuration>
       </plugin>
     </plugins>
diff --git a/org.eclipse.jgit.http.test/pom.xml b/org.eclipse.jgit.http.test/pom.xml
index 2426cb5b8..df8dc2790 100644
--- a/org.eclipse.jgit.http.test/pom.xml
+++ b/org.eclipse.jgit.http.test/pom.xml
@@ -139,7 +139,7 @@
       <plugin>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <argLine>@{argLine} -Djava.io.tmpdir=${project.build.directory}  -Xmx300m</argLine>
+          <argLine>@{argLine} -Djava.io.tmpdir=${project.build.directory}  -Xmx512m</argLine>
           <includes>
             <include>**/*Test.java</include>
             <include>**/*Tests.java</include>
diff --git a/org.eclipse.jgit.lfs.server.test/BUILD b/org.eclipse.jgit.lfs.server.test/BUILD
index 1341dd601..fb0d6918f 100644
--- a/org.eclipse.jgit.lfs.server.test/BUILD
+++ b/org.eclipse.jgit.lfs.server.test/BUILD
@@ -32,7 +32,7 @@ junit_tests(
         exclude = TEST_BASE,
     ),
     jvm_flags = [
-        "-Xmx256m",
+        "-Xmx512m",
         "-Dfile.encoding=UTF-8",
     ],
     tags = ["lfs-server"],
diff --git a/org.eclipse.jgit.lfs.server.test/pom.xml b/org.eclipse.jgit.lfs.server.test/pom.xml
index 41ce5105e..ce1e280f9 100644
--- a/org.eclipse.jgit.lfs.server.test/pom.xml
+++ b/org.eclipse.jgit.lfs.server.test/pom.xml
@@ -137,7 +137,7 @@
       <plugin>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <argLine>@{argLine} -Djava.io.tmpdir=${project.build.directory}  -Xmx300m</argLine>
+          <argLine>@{argLine} -Djava.io.tmpdir=${project.build.directory}  -Xmx512m</argLine>
         </configuration>
       </plugin>
     </plugins>
diff --git a/org.eclipse.jgit.lfs.test/pom.xml b/org.eclipse.jgit.lfs.test/pom.xml
index 30b73f8db..ef9770893 100644
--- a/org.eclipse.jgit.lfs.test/pom.xml
+++ b/org.eclipse.jgit.lfs.test/pom.xml
@@ -111,7 +111,7 @@
       <plugin>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <argLine>@{argLine} -Djava.io.tmpdir=${project.build.directory}  -Xmx300m</argLine>
+          <argLine>@{argLine} -Djava.io.tmpdir=${project.build.directory}  -Xmx512m</argLine>
         </configuration>
       </plugin>
     </plugins>
diff --git a/org.eclipse.jgit.pgm.test/BUILD b/org.eclipse.jgit.pgm.test/BUILD
index 5bedf9ade..f32fa12de 100644
--- a/org.eclipse.jgit.pgm.test/BUILD
+++ b/org.eclipse.jgit.pgm.test/BUILD
@@ -7,7 +7,7 @@ junit_tests(
     name = "pgm",
     srcs = glob(["tst/**/*.java"]),
     jvm_flags = [
-        "-Xmx256m",
+        "-Xmx512m",
         "-Dfile.encoding=UTF-8",
     ],
     tags = ["pgm"],
diff --git a/org.eclipse.jgit.pgm.test/pom.xml b/org.eclipse.jgit.pgm.test/pom.xml
index 326c28e65..fcdebdca3 100644
--- a/org.eclipse.jgit.pgm.test/pom.xml
+++ b/org.eclipse.jgit.pgm.test/pom.xml
@@ -109,7 +109,7 @@
       <plugin>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <argLine>@{argLine} -Djava.io.tmpdir=${project.build.directory}</argLine>
+          <argLine>@{argLine} -Xmx512m -Djava.io.tmpdir=${project.build.directory}</argLine>
         </configuration>
       </plugin>
     </plugins>
diff --git a/org.eclipse.jgit.test/pom.xml b/org.eclipse.jgit.test/pom.xml
index c0b851396..624875618 100644
--- a/org.eclipse.jgit.test/pom.xml
+++ b/org.eclipse.jgit.test/pom.xml
@@ -190,7 +190,7 @@
       <plugin>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <argLine>@{argLine} -Xmx1024m -Dfile.encoding=UTF-8 -Djava.io.tmpdir=${project.build.directory}</argLine>
+          <argLine>@{argLine} -Xmx768m -Dfile.encoding=UTF-8 -Djava.io.tmpdir=${project.build.directory}</argLine>
           <includes>
             <include>**/*Test.java</include>
             <include>**/*Tests.java</include>