diff --git a/fsl/wrappers/wrapperutils.py b/fsl/wrappers/wrapperutils.py
index ac647674bfa4c1161f8b5e8ed62e8268a9940518..260841d4b90f6386a9070c02a8aae474685b3749 100644
--- a/fsl/wrappers/wrapperutils.py
+++ b/fsl/wrappers/wrapperutils.py
@@ -1047,7 +1047,8 @@ def fileOrImage(*args, **kwargs):
             # in-memory image - we have
             # to save it out to a file
             if infile is None:
-                hd, infile = tempfile.mkstemp(fslimage.defaultExt())
+                hd, infile = tempfile.mkstemp(fslimage.defaultExt(),
+                                              dir=workdir)
                 os.close(hd)
                 val.to_filename(infile)
 
@@ -1110,7 +1111,7 @@ def fileOrArray(*args, **kwargs):
         infile = None
 
         if isinstance(val, np.ndarray):
-            hd, infile = tempfile.mkstemp('.txt')
+            hd, infile = tempfile.mkstemp('.txt', dir=workdir)
             os.close(hd)
             np.savetxt(infile, val, fmt='%0.18f')
 
@@ -1176,6 +1177,7 @@ def fileOrText(*args, **kwargs):
         if not isinstance(val, pathlib.Path):
             with tempfile.NamedTemporaryFile(mode='w',
                                              suffix='.txt',
+                                             dir=workdir,
                                              delete=False) as f:
                 f.write(val)
                 infile = f.name