diff --git a/infer/tests/codetoanalyze/c/errors/assertions/assertion_example.c b/infer/tests/codetoanalyze/c/errors/assertions/assertion_example.c
index e022631df..e3112b51e 100644
--- a/infer/tests/codetoanalyze/c/errors/assertions/assertion_example.c
+++ b/infer/tests/codetoanalyze/c/errors/assertions/assertion_example.c
@@ -7,6 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
+// TODO: remove this #define, it's here to get a specific version of
+// [assert], as others may confuse the clang frontend (t26324545)
+#define __STRICT_ANSI__
 #include <assert.h>
 
 // We should report here no NPE, but also we should report div0 to show that we
diff --git a/infer/tests/codetoanalyze/c/errors/assertions/assertion_failure.c b/infer/tests/codetoanalyze/c/errors/assertions/assertion_failure.c
index 50e63413f..910071469 100644
--- a/infer/tests/codetoanalyze/c/errors/assertions/assertion_failure.c
+++ b/infer/tests/codetoanalyze/c/errors/assertions/assertion_failure.c
@@ -7,6 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
+// TODO: remove this #define, it's here to get a specific version of
+// [assert], as others may confuse the clang frontend (t26324545)
+#define __STRICT_ANSI__
 #include <assert.h>
 #include <stdlib.h>