diff --git a/libports/run/libc_ffat.run b/libports/run/libc_ffat.run
index 714373a8e..a0726759d 100644
--- a/libports/run/libc_ffat.run
+++ b/libports/run/libc_ffat.run
@@ -48,7 +48,7 @@ set config {
 		<any-service> <parent/> <any-child/> </any-service>
 	</default-route>
 	<start name="timer">
-		<resource name="RAM" quantum="512K"/>
+		<resource name="RAM" quantum="1M"/>
 		<provides> <service name="Timer"/> </provides>
 	</start>
 	<start name="test-libc_ffat">
@@ -58,7 +58,7 @@ set config {
 
 append_if [have_spec pci] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="1M"/>
+		<resource name="RAM" quantum="2M"/>
 		<provides> <service name="PCI"/> </provides>
 	</start>
 	<start name="atapi_drv">
diff --git a/libports/run/python.run b/libports/run/python.run
index 53c19f1a6..118c20ac1 100644
--- a/libports/run/python.run
+++ b/libports/run/python.run
@@ -38,7 +38,7 @@ set config {
 		<any-service> <parent/> <any-child/> </any-service>
 	</default-route>
 	<start name="test-python">
-		<resource name="RAM" quantum="2M"/>
+		<resource name="RAM" quantum="3M"/>
 		<config>
 			<script name="hello.py"/>
 		</config>
diff --git a/os/run/tar_rom.run b/os/run/tar_rom.run
index 6dbdc4bb0..0a983b627 100644
--- a/os/run/tar_rom.run
+++ b/os/run/tar_rom.run
@@ -37,7 +37,7 @@ install_config {
 		<provides><service name="Timer"/></provides>
 	</start>
 	<start name="tar_rom">
-		<resource name="RAM" quantum="4M"/>
+		<resource name="RAM" quantum="5M"/>
 		<provides><service name="ROM"/></provides>
 		<config>
 			<archive name="archive.tar"/>
diff --git a/os/src/test/dynamic_config/master/main.cc b/os/src/test/dynamic_config/master/main.cc
index fd031a011..6caae86b8 100644
--- a/os/src/test/dynamic_config/master/main.cc
+++ b/os/src/test/dynamic_config/master/main.cc
@@ -47,7 +47,7 @@ int main(int, char **)
 	/* define initial config for slave */
 	slave_policy.configure("<config><counter>-1</counter></config>");
 
-	static Genode::Slave slave(ep, slave_policy, 512*1024);
+	static Genode::Slave slave(ep, slave_policy, 768*1024);
 
 	/* update slave config at regular intervals */
 	int counter = 0;