diff --git a/.gitignore b/.gitignore
index 4213d07a68..49dfe1f72f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,3 +29,5 @@ __pycache__/
 .ipynb_checkpoints/
 .ruby-version
 .pytest_cache
+.vscode
+.history
diff --git a/nipype/interfaces/mrtrix3/reconst.py b/nipype/interfaces/mrtrix3/reconst.py
index 3f21e9ad54..514622e021 100644
--- a/nipype/interfaces/mrtrix3/reconst.py
+++ b/nipype/interfaces/mrtrix3/reconst.py
@@ -109,12 +109,10 @@ class EstimateFODInputSpec(MRTrix3BaseInputSpec):
     )
     gm_txt = File(argstr="%s", position=-4, desc="GM response text file")
     gm_odf = File(
-        "gm.mif", usedefault=True, argstr="%s", position=-3, desc="output GM ODF"
-    )
+        "gm.mif", argstr="%s", position=-3, desc="output GM ODF")
     csf_txt = File(argstr="%s", position=-2, desc="CSF response text file")
     csf_odf = File(
-        "csf.mif", usedefault=True, argstr="%s", position=-1, desc="output CSF ODF"
-    )
+        "csf.mif", argstr="%s", position=-1, desc="output CSF ODF")
     mask_file = File(exists=True, argstr="-mask %s", desc="mask image")
 
     # DW Shell selection options
@@ -171,6 +169,8 @@ class EstimateFOD(MRTrix3Base):
     >>> fod.inputs.in_file = 'dwi.mif'
     >>> fod.inputs.wm_txt = 'wm.txt'
     >>> fod.inputs.grad_fsl = ('bvecs', 'bvals')
+    >>> fod.inputs.gm_odf = 'gm.mif'
+    >>> fod.inputs.csf_odf = 'csf.mif'
     >>> fod.cmdline
     'dwi2fod -fslgrad bvecs bvals -lmax 8 msmt_csd dwi.mif wm.txt wm.mif gm.mif csf.mif'
     >>> fod.run()  # doctest: +SKIP
diff --git a/nipype/interfaces/mrtrix3/tests/test_auto_EstimateFOD.py b/nipype/interfaces/mrtrix3/tests/test_auto_EstimateFOD.py
index bfadae423f..9506f84e4a 100644
--- a/nipype/interfaces/mrtrix3/tests/test_auto_EstimateFOD.py
+++ b/nipype/interfaces/mrtrix3/tests/test_auto_EstimateFOD.py
@@ -7,10 +7,10 @@ def test_EstimateFOD_inputs():
         algorithm=dict(argstr="%s", mandatory=True, position=-8,),
         args=dict(argstr="%s",),
         bval_scale=dict(argstr="-bvalue_scaling %s",),
-        csf_odf=dict(argstr="%s", extensions=None, position=-1, usedefault=True,),
+        csf_odf=dict(argstr="%s", extensions=None, position=-1,),
         csf_txt=dict(argstr="%s", extensions=None, position=-2,),
         environ=dict(nohash=True, usedefault=True,),
-        gm_odf=dict(argstr="%s", extensions=None, position=-3, usedefault=True,),
+        gm_odf=dict(argstr="%s", extensions=None, position=-3,),
         gm_txt=dict(argstr="%s", extensions=None, position=-4,),
         grad_file=dict(argstr="-grad %s", extensions=None, xor=["grad_fsl"],),
         grad_fsl=dict(argstr="-fslgrad %s %s", xor=["grad_file"],),