diff --git a/tests/spec2nii_test_data b/tests/spec2nii_test_data
index 6f205d3..e0ad587 160000
--- a/tests/spec2nii_test_data
+++ b/tests/spec2nii_test_data
@@ -1 +1 @@
-Subproject commit 6f205d389085a420b38689f573045166517bb445
+Subproject commit e0ad5870cd5891bbe3fdcf9415845cde1f194884
diff --git a/tests/test_siemens_rda.py b/tests/test_siemens_rda.py
index aac48e4..b8f2be8 100644
--- a/tests/test_siemens_rda.py
+++ b/tests/test_siemens_rda.py
@@ -18,6 +18,8 @@
 xa20_svs_path = siemens_path / 'XAData' / 'XA20/rda/spct_002.MR.MRI-LAB Test_Dir.5.1.114540.rda'
 xa31_locale_svs_path = siemens_path / 'XAData' / 'XA31/rda/locale_XA31.rda'
 
+latin1_encoding = siemens_path / 'rda' / 'latin1.rda'
+
 
 def test_xa20_svs(tmp_path):
 
@@ -53,3 +55,21 @@ def test_xa31_locale_svs(tmp_path):
 
     assert img_t.shape == (1, 1, 1, 1024)
     assert np.iscomplexobj(img_t.dataobj)
+
+
+def test_latin_encoding(tmp_path):
+
+    subprocess.check_call(['spec2nii', 'rda',
+                           '-f', 'rda_latin1',
+                           '-o', tmp_path,
+                           '-j', str(latin1_encoding)])
+
+    img_t = read_nifti_mrs(tmp_path / 'rda_latin1.nii.gz')
+
+    hdr_ext_codes = img_t.header.extensions.get_codes()
+    hdr_ext = json.loads(img_t.header.extensions[hdr_ext_codes.index(44)].get_content())
+
+    hdr_ext['ResonantNucleus'] = ['1H', ]
+
+    assert img_t.shape == (1, 1, 1, 2048)
+    assert np.iscomplexobj(img_t.dataobj)