diff --git a/tests/run-emitter-test-suite.c b/tests/run-emitter-test-suite.c
index 950ad546..a87ce3b1 100644
--- a/tests/run-emitter-test-suite.c
+++ b/tests/run-emitter-test-suite.c
@@ -13,7 +13,7 @@ int usage(int ret);
 
 int main(int argc, char *argv[])
 {
-    FILE *input;
+    FILE *input = NULL;
     yaml_emitter_t emitter;
     yaml_event_t event;
     yaml_version_directive_t *version_directive = NULL;
diff --git a/tests/run-parser-test-suite.c b/tests/run-parser-test-suite.c
index 5e29caff..a3540e3e 100644
--- a/tests/run-parser-test-suite.c
+++ b/tests/run-parser-test-suite.c
@@ -8,7 +8,7 @@ int usage(int ret);
 
 int main(int argc, char *argv[])
 {
-    FILE *input;
+    FILE *input = NULL;
     yaml_parser_t parser;
     yaml_event_t event;
     int flow = -1; /** default no flow style collections */