diff --git a/doc/xml/release.xml b/doc/xml/release.xml
index 0925d1672..25243953c 100644
--- a/doc/xml/release.xml
+++ b/doc/xml/release.xml
@@ -104,6 +104,10 @@
                         <p>Warnings in C builds treated as errors.</p>
                     </release-item>
 
+                    <release-item>
+                        <p>Run all tests on tempfs rather than local disk.</p>
+                    </release-item>
+
                     <release-item>
                         <p>Remove Debian test repo after PostgreSQL 10 release.</p>
                     </release-item>
diff --git a/test/Vagrantfile b/test/Vagrantfile
index 57ddda8e3..242bd33de 100644
--- a/test/Vagrantfile
+++ b/test/Vagrantfile
@@ -1,6 +1,6 @@
 Vagrant.configure(2) do |config|
     config.vm.provider :virtualbox do |vb|
-        vb.memory = 2048
+        vb.memory = 4096
         vb.cpus = 8
     end
 
diff --git a/test/test.pl b/test/test.pl
index 9927d61cd..e6480f17b 100755
--- a/test/test.pl
+++ b/test/test.pl
@@ -335,7 +335,11 @@ eval
                 push(@{$oyProcess}, undef);
             }
 
+
+            executeTest("sudo umount ${strTestPath}", {bSuppressError => true});
             executeTest("sudo rm -rf ${strTestPath}/*");
+            $oStorageTest->pathCreate($strTestPath, {strMode => '0770', bIgnoreExists => true});
+            executeTest("sudo mount -t tmpfs -o size=2560M test ${strTestPath}");
             $oStorageTest->pathCreate($strCoveragePath, {strMode => '0770', bIgnoreMissing => true, bCreateParent => true});
         }