diff --git a/configure/os/CONFIG.RHEL8-x86_64.RHEL7-x86_64 b/configure/os/CONFIG.RHEL8-x86_64.RHEL7-x86_64
index 7f4c852cd..95ee5e5bd 100644
--- a/configure/os/CONFIG.RHEL8-x86_64.RHEL7-x86_64
+++ b/configure/os/CONFIG.RHEL8-x86_64.RHEL7-x86_64
@@ -23,3 +23,6 @@ ARCH_DEP_LDFLAGS+=-Wl,-rpath-link,$(INSTALL_LIB)
 # Our host versions work just fine.
 AR = ar -rc
 RANLIB = ranlib
+
+# Allow to run cross-tests which expect different lib versions
+export LD_PRELOAD=$(SYSROOT)/lib64/libreadline.so
diff --git a/configure/os/CONFIG.RHEL9-x86_64.RHEL7-x86_64 b/configure/os/CONFIG.RHEL9-x86_64.RHEL7-x86_64
index 58eb39b57..3933e37fd 100644
--- a/configure/os/CONFIG.RHEL9-x86_64.RHEL7-x86_64
+++ b/configure/os/CONFIG.RHEL9-x86_64.RHEL7-x86_64
@@ -16,3 +16,6 @@ export LD_LIBRARY_PATH := $(LD_LIBRARY_PATH:%=%:)$(TOOLSET_DIR:%=$(SYSROOT)%/usr
 
 # The linker has problems to find indirectly referenced libraries
 PROD_LDLIBS += $(LDLIBS)
+
+# Allow to run cross-tests which expect different lib versions
+export LD_PRELOAD=$(SYSROOT)/lib64/libreadline.so
diff --git a/configure/os/CONFIG.RHEL9-x86_64.RHEL8-x86_64 b/configure/os/CONFIG.RHEL9-x86_64.RHEL8-x86_64
index d9aebf55b..1ddec0cdd 100644
--- a/configure/os/CONFIG.RHEL9-x86_64.RHEL8-x86_64
+++ b/configure/os/CONFIG.RHEL9-x86_64.RHEL8-x86_64
@@ -20,3 +20,6 @@ CPPFLAGS += $(WRAPPER)
 # But but our host versions work just fine.
 AR = ar -rc
 RANLIB = ranlib
+
+# Allow to run cross-tests which expect different lib versions
+export LD_PRELOAD=$(SYSROOT)/lib64/libreadline.so
diff --git a/configure/os/CONFIG_SITE.RHEL8-x86_64.Common b/configure/os/CONFIG_SITE.RHEL8-x86_64.Common
index 244520f20..638d48b1d 100644
--- a/configure/os/CONFIG_SITE.RHEL8-x86_64.Common
+++ b/configure/os/CONFIG_SITE.RHEL8-x86_64.Common
@@ -2,6 +2,8 @@ include $(CONFIG)/os/CONFIG_SITE.linux-x86_64.Common
 
 # Improved error checking with clang
 CROSS_COMPILER_TARGET_ARCHS += RHEL8-x86_64-clang
+CROSS_COMPILER_RUNTEST_ARCHS += RHEL8-x86_64-clang
 
 # Build for old RHEL7 64 bit
 #CROSS_COMPILER_TARGET_ARCHS += RHEL7-x86_64
+#CROSS_COMPILER_RUNTEST_ARCHS += RHEL7-x86_64
diff --git a/configure/os/CONFIG_SITE.RHEL9-x86_64.Common b/configure/os/CONFIG_SITE.RHEL9-x86_64.Common
index 6f6ea176f..e70b16936 100644
--- a/configure/os/CONFIG_SITE.RHEL9-x86_64.Common
+++ b/configure/os/CONFIG_SITE.RHEL9-x86_64.Common
@@ -8,6 +8,6 @@ CROSS_COMPILER_RUNTEST_ARCHS += RHEL9-x86_64-clang
 CROSS_COMPILER_TARGET_ARCHS += RHEL8-x86_64
 CROSS_COMPILER_RUNTEST_ARCHS += RHEL8-x86_64
 
-# Build for old RHEL7 64 bit
+# Build for even older RHEL7 64 bit
 #CROSS_COMPILER_TARGET_ARCHS += RHEL7-x86_64
-#CROSS_COMPILER_RUNTEST_TARGET_ARCHS += RHEL7-x86_64
+#CROSS_COMPILER_RUNTEST_ARCHS += RHEL7-x86_64