diff --git a/test/C++Frontend/dg.exp b/test/C++Frontend/dg.exp
index 879685ca879..d8e89899301 100644
--- a/test/C++Frontend/dg.exp
+++ b/test/C++Frontend/dg.exp
@@ -1,3 +1,5 @@
 load_lib llvm.exp
 
-RunLLVMTests [lsort [glob -nocomplain $srcdir/$subdir/*.{ll,llx,c,cpp,tr}]]
+if [ llvm_gcc_supports c++ ] then {
+  RunLLVMTests [lsort [glob -nocomplain $srcdir/$subdir/*.{ll,llx,c,cpp,tr}]]
+}
diff --git a/test/CFrontend/dg.exp b/test/CFrontend/dg.exp
index 879685ca879..6675048e693 100644
--- a/test/CFrontend/dg.exp
+++ b/test/CFrontend/dg.exp
@@ -1,3 +1,5 @@
 load_lib llvm.exp
 
-RunLLVMTests [lsort [glob -nocomplain $srcdir/$subdir/*.{ll,llx,c,cpp,tr}]]
+if [ llvm_gcc_supports c ] then {
+  RunLLVMTests [lsort [glob -nocomplain $srcdir/$subdir/*.{ll,llx,c,cpp,tr}]]
+}