diff --git a/src/modules/dynamic_module_makefile.in b/src/modules/dynamic_module_makefile.in
index 035f97a1d0f0644ee93a8a5ae08b69acb7394c0c..5c3938c0262b28998a3eb4402c164e1983e72b80 100644
--- a/src/modules/dynamic_module_makefile.in
+++ b/src/modules/dynamic_module_makefile.in
@@ -37,7 +37,7 @@ verbose_verify: module_testsuite
 
 gdb_verify: module_testsuite
 	@echo >.gdbinit handle SIGUSR1 nostop noprint pass
-	@echo >>.gdbinit run -m $(SRCDIR)/../../../lib/master.pike $(PIKEOPTS) $(SRCDIR)/../../../bin/test_pike.pike module_testsuite -v -v -f
+	@echo >>.gdbinit run -DNOT_INSTALLED -M.. -m $(SRCDIR)/../../../lib/master.pike $(PIKEOPTS) $(SRCDIR)/../../../bin/test_pike.pike module_testsuite -v -v -f
 	gdb ../../pike
 	@rm .gdbinit
 
diff --git a/src/modules/static_module_makefile.in b/src/modules/static_module_makefile.in
index 7dc5a8fbc97af76a86ca9b90cfe02b10dca0d11b..54c95dcc4a316e8eadfafb075944500979addcd4 100644
--- a/src/modules/static_module_makefile.in
+++ b/src/modules/static_module_makefile.in
@@ -38,7 +38,7 @@ verbose_verify: module_testsuite
 
 gdb_verify: module_testsuite
 	@echo >.gdbinit handle SIGUSR1 nostop noprint pass
-	@echo >>.gdbinit run -m $(SRCDIR)/../../../lib/master.pike $(PIKEOPTS) $(SRCDIR)/../../../bin/test_pike.pike module_testsuite -v -v -f
+	@echo >>.gdbinit run -DNOT_INSTALLED -M.. -m $(SRCDIR)/../../../lib/master.pike $(PIKEOPTS) $(SRCDIR)/../../../bin/test_pike.pike module_testsuite -v -v -f
 	gdb ../../pike
 	@rm .gdbinit