diff --git a/gcc/testsuite/gcc.dg/analyzer/analyzer-verbosity-2a.c b/gcc/testsuite/gcc.dg/analyzer/analyzer-verbosity-2a.c
index 9faf5da3a4f..cf014b0a3c8 100644
--- a/gcc/testsuite/gcc.dg/analyzer/analyzer-verbosity-2a.c
+++ b/gcc/testsuite/gcc.dg/analyzer/analyzer-verbosity-2a.c
@@ -1,6 +1,9 @@
 /* { dg-additional-options "-fanalyzer-verbosity=2" } */
 
-#include <stdio.h>
+typedef struct FILE   FILE;
+
+FILE* fopen (const char*, const char*);
+int   fclose (FILE*);
 
 extern int foo ();
 extern void bar ();
diff --git a/gcc/testsuite/gcc.dg/analyzer/analyzer-verbosity-3a.c b/gcc/testsuite/gcc.dg/analyzer/analyzer-verbosity-3a.c
index 1b2b7983624..b0ece203f56 100644
--- a/gcc/testsuite/gcc.dg/analyzer/analyzer-verbosity-3a.c
+++ b/gcc/testsuite/gcc.dg/analyzer/analyzer-verbosity-3a.c
@@ -1,6 +1,9 @@
 /* { dg-additional-options "-fanalyzer-verbosity=3" } */
 
-#include <stdio.h>
+typedef struct FILE   FILE;
+
+FILE* fopen (const char*, const char*);
+int   fclose (FILE*);
 
 extern int foo ();
 extern void bar ();
diff --git a/gcc/testsuite/gcc.dg/analyzer/edges-1.c b/gcc/testsuite/gcc.dg/analyzer/edges-1.c
index 6b53ddddc05..f08a6143d59 100644
--- a/gcc/testsuite/gcc.dg/analyzer/edges-1.c
+++ b/gcc/testsuite/gcc.dg/analyzer/edges-1.c
@@ -1,4 +1,7 @@
-#include <stdio.h>
+typedef struct FILE   FILE;
+
+FILE* fopen (const char*, const char*);
+int   fclose (FILE*);
 
 extern int foo ();
 extern void bar ();
diff --git a/gcc/testsuite/gcc.dg/analyzer/file-1.c b/gcc/testsuite/gcc.dg/analyzer/file-1.c
index 0f4bc5aa7af..e8d934331fd 100644
--- a/gcc/testsuite/gcc.dg/analyzer/file-1.c
+++ b/gcc/testsuite/gcc.dg/analyzer/file-1.c
@@ -1,4 +1,9 @@
-#include <stdio.h>
+typedef struct FILE   FILE;
+
+FILE* fopen (const char*, const char*);
+int   fclose (FILE*);
+#define SEEK_SET        0
+int fseek (FILE *, long int, int);
 
 void
 test_1 (const char *path)
diff --git a/gcc/testsuite/gcc.dg/analyzer/file-2.c b/gcc/testsuite/gcc.dg/analyzer/file-2.c
index 8d34c739084..9c58108a531 100644
--- a/gcc/testsuite/gcc.dg/analyzer/file-2.c
+++ b/gcc/testsuite/gcc.dg/analyzer/file-2.c
@@ -1,4 +1,7 @@
-#include <stdio.h>
+typedef struct FILE   FILE;
+
+FILE* fopen (const char*, const char*);
+int   fclose (FILE*);
 
 struct foo
 {
diff --git a/gcc/testsuite/gcc.dg/analyzer/file-paths-1.c b/gcc/testsuite/gcc.dg/analyzer/file-paths-1.c
index d346f7a7c9a..f35017835d4 100644
--- a/gcc/testsuite/gcc.dg/analyzer/file-paths-1.c
+++ b/gcc/testsuite/gcc.dg/analyzer/file-paths-1.c
@@ -1,6 +1,13 @@
 /* { dg-additional-options "-fanalyzer-verbosity=3" } */
 
-#include <stdio.h>
+typedef struct FILE   FILE;
+
+FILE* fopen (const char*, const char*);
+int   fclose (FILE*);
+char *fgets (char *, int, FILE *);
+
+#define NULL ((void *)0)
+
 
 /* Verify that we correctly emit CFG events in the face of buffers
    being clobbered in these leak reports.  */
diff --git a/gcc/testsuite/gcc.dg/analyzer/file-pr58237.c b/gcc/testsuite/gcc.dg/analyzer/file-pr58237.c
index 68f49c25607..ecc7144198b 100644
--- a/gcc/testsuite/gcc.dg/analyzer/file-pr58237.c
+++ b/gcc/testsuite/gcc.dg/analyzer/file-pr58237.c
@@ -1,4 +1,10 @@
-#include <stdio.h>
+typedef struct FILE   FILE;
+
+FILE* fopen (const char*, const char*);
+int   fclose (FILE*);
+char *fgets (char *, int, FILE *);
+
+#define NULL ((void *)0)
 
 void f0(const char *str)
 {
diff --git a/gcc/testsuite/gcc.dg/analyzer/pr99716-1.c b/gcc/testsuite/gcc.dg/analyzer/pr99716-1.c
index 6720c3c198b..2ccdcc73a5c 100644
--- a/gcc/testsuite/gcc.dg/analyzer/pr99716-1.c
+++ b/gcc/testsuite/gcc.dg/analyzer/pr99716-1.c
@@ -1,5 +1,10 @@
-#include <stdio.h>
-#include <stdlib.h>
+typedef struct FILE   FILE;
+
+FILE* fopen (const char*, const char*);
+int   fclose (FILE*);
+int fprintf (FILE *, const char *, ...);
+
+#define NULL ((void *)0)
 
 void
 test_1 (void)