diff --git a/tests/test-marray.c b/tests/test-marray.c
index 64b05d3e..edbdc824 100644
--- a/tests/test-marray.c
+++ b/tests/test-marray.c
@@ -21,7 +21,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <stdio.h>
-#include "mympz.h"
+#include "test-obj.h"
 #include "m-array.h"
 #include "coverage.h"
 
diff --git a/tests/test-mbptree.c b/tests/test-mbptree.c
index 23f3cad7..1c6f5f13 100644
--- a/tests/test-mbptree.c
+++ b/tests/test-mbptree.c
@@ -24,7 +24,7 @@
 #include <stdlib.h>
 #include "m-string.h"
 #include "m-bptree.h"
-#include "mympz.h"
+#include "test-obj.h"
 #include "coverage.h"
 
 START_COVERAGE
diff --git a/tests/test-mbuffer.c b/tests/test-mbuffer.c
index 87a497ef..2701d418 100644
--- a/tests/test-mbuffer.c
+++ b/tests/test-mbuffer.c
@@ -22,7 +22,7 @@
 */
 #include "m-buffer.h"
 
-#include "mympz.h"
+#include "test-obj.h"
 #include "coverage.h"
 START_COVERAGE
 // Define a fixed queue of unsigned int
diff --git a/tests/test-mcore.c b/tests/test-mcore.c
index f013202b..53aea41e 100644
--- a/tests/test-mcore.c
+++ b/tests/test-mcore.c
@@ -23,7 +23,7 @@
 
 #include <stdbool.h>
 #include <assert.h>
-#include "mympz.h"
+#include "test-obj.h"
 
 #include "m-core.h"
 
diff --git a/tests/test-mdeque.c b/tests/test-mdeque.c
index 3efe80cc..9a331771 100644
--- a/tests/test-mdeque.c
+++ b/tests/test-mdeque.c
@@ -21,7 +21,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <stdio.h>
-#include "mympz.h"
+#include "test-obj.h"
 
 #include "m-string.h"
 #include "m-deque.h"
diff --git a/tests/test-mdict.c b/tests/test-mdict.c
index 61062fd3..4db77b56 100644
--- a/tests/test-mdict.c
+++ b/tests/test-mdict.c
@@ -25,7 +25,7 @@
 #include "m-dict.h"
 #include "m-array.h"
 #include "m-string.h"
-#include "mympz.h"
+#include "test-obj.h"
 
 static inline bool oor_equal_p(int k, unsigned char n) { return k == (int)-n-1; }
 static inline void oor_set(int *k, unsigned char n) { *k = (int)-n-1; }
diff --git a/tests/test-mlist.c b/tests/test-mlist.c
index b96d708c..5d907a9f 100644
--- a/tests/test-mlist.c
+++ b/tests/test-mlist.c
@@ -21,7 +21,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <stdio.h>
-#include "mympz.h"
+#include "test-obj.h"
 #include "m-string.h"
 #include "m-list.h"
 
diff --git a/tests/test-mprioqueue.c b/tests/test-mprioqueue.c
index 00e6a260..ce499f4c 100644
--- a/tests/test-mprioqueue.c
+++ b/tests/test-mprioqueue.c
@@ -22,7 +22,7 @@
 */
 #include <stdio.h>
 #include <assert.h>
-#include "mympz.h"
+#include "test-obj.h"
 #include "m-prioqueue.h"
 
 #include "coverage.h"
diff --git a/tests/test-mrbtree.c b/tests/test-mrbtree.c
index 123f3a5e..b010fab9 100644
--- a/tests/test-mrbtree.c
+++ b/tests/test-mrbtree.c
@@ -21,7 +21,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <stdio.h>
-#include "mympz.h"
+#include "test-obj.h"
 #include "m-string.h"
 #include "m-rbtree.h"
 
diff --git a/tests/test-mshared.c b/tests/test-mshared.c
index ee5c03d3..9fa4043d 100644
--- a/tests/test-mshared.c
+++ b/tests/test-mshared.c
@@ -21,7 +21,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <assert.h>
-#include "mympz.h"
+#include "test-obj.h"
 
 #include "m-shared.h"
 
diff --git a/tests/test-msnapshot.c b/tests/test-msnapshot.c
index 94a21c4c..42200978 100644
--- a/tests/test-msnapshot.c
+++ b/tests/test-msnapshot.c
@@ -20,7 +20,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
-#include "mympz.h"
+#include "test-obj.h"
 
 #include "m-snapshot.h"
 #include "m-mutex.h"
diff --git a/tests/test-mtuple.c b/tests/test-mtuple.c
index 1918cbec..4dbf4b07 100644
--- a/tests/test-mtuple.c
+++ b/tests/test-mtuple.c
@@ -21,7 +21,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <stdio.h>
-#include "mympz.h"
+#include "test-obj.h"
 #include "m-string.h"
 
 #include "m-tuple.h"
diff --git a/tests/test-mvariant.c b/tests/test-mvariant.c
index 05839fec..ab0e0b8d 100644
--- a/tests/test-mvariant.c
+++ b/tests/test-mvariant.c
@@ -21,7 +21,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <stdio.h>
-#include "mympz.h"
+#include "test-obj.h"
 #include "m-string.h"
 
 #include "m-variant.h"
diff --git a/tests/mympz.h b/tests/test-obj.h
similarity index 100%
rename from tests/mympz.h
rename to tests/test-obj.h