diff --git a/gdb/testsuite/gdb.base/cvexpr.exp b/gdb/testsuite/gdb.base/cvexpr.exp
index e7ff730e92f..d8437b94c61 100644
--- a/gdb/testsuite/gdb.base/cvexpr.exp
+++ b/gdb/testsuite/gdb.base/cvexpr.exp
@@ -494,7 +494,7 @@ proc do_test {dir options} {
 # Build up the set of debug formats for which we will run this test.
 set specs { {dwarf {debug}} }
 if ![skip_ctf_tests] {
-    lappend specs {ctf {"additional_flags=-gt"}}
+    lappend specs {ctf {"additional_flags=-gctf"}}
 }
 
 # Setup and run the test for each debug format.
diff --git a/gdb/testsuite/gdb.base/whatis.exp b/gdb/testsuite/gdb.base/whatis.exp
index 2bce3f5cdcb..c19c149f012 100644
--- a/gdb/testsuite/gdb.base/whatis.exp
+++ b/gdb/testsuite/gdb.base/whatis.exp
@@ -588,7 +588,7 @@ proc do_test {dir options} {
 # Build up the set of debug formats for which we will run this test.
 set specs { {dwarf {debug}} }
 if ![skip_ctf_tests] {
-    lappend specs {ctf {"additional_flags=-gt"}}
+    lappend specs {ctf {"additional_flags=-gctf"}}
 }
 
 # Setup and run the test for each debug format.