diff --git a/makefiles/duckdb_extension.Makefile b/makefiles/duckdb_extension.Makefile
index 39d405b..1927666 100644
--- a/makefiles/duckdb_extension.Makefile
+++ b/makefiles/duckdb_extension.Makefile
@@ -83,6 +83,11 @@ TEST_RELEASE_TARGET=test_release_internal
 TEST_DEBUG_TARGET=test_debug_internal
 TEST_RELDEBUG_TARGET=test_reldebug_internal
 
+# Disable testing outside docker: the unittester is currently dynamically linked by default
+ifeq($(LINUX_TESTS_OUTSIDE_DOCKER),1)
+    SKIP_TESTS=1
+endif
+
 ifeq ($(SKIP_TESTS),1)
 	TEST_RELEASE_TARGET=tests_skipped
 	TEST_DEBUG_TARGET=tests_skipped