diff --git a/core/tests/test_trezor.io.fatfs.py b/core/tests/test_trezor.io.fatfs.py
index 1aa470cdc..359228c5f 100644
--- a/core/tests/test_trezor.io.fatfs.py
+++ b/core/tests/test_trezor.io.fatfs.py
@@ -1,7 +1,9 @@
 from common import *
 
-from trezorio import fatfs, sdcard
+from trezor import utils
 
+if utils.USE_SD_CARD:
+    from trezorio import fatfs, sdcard
 
 
 class TestTrezorIoFatfs(unittest.TestCase):
@@ -226,4 +228,5 @@ class TestTrezorIoFatfsAndSdcard(unittest.TestCase):
 
 
 if __name__ == "__main__":
-    unittest.main()
+    if utils.USE_SD_CARD:
+        unittest.main()
diff --git a/core/tests/test_trezor.io.sdcard.py b/core/tests/test_trezor.io.sdcard.py
index 229389e8d..497bee290 100644
--- a/core/tests/test_trezor.io.sdcard.py
+++ b/core/tests/test_trezor.io.sdcard.py
@@ -1,7 +1,6 @@
 from common import *
 
-from trezor import io
-
+from trezor import io, utils
 
 
 class TestTrezorIoSdcard(unittest.TestCase):
@@ -44,4 +43,5 @@ class TestTrezorIoSdcard(unittest.TestCase):
 
 
 if __name__ == "__main__":
-    unittest.main()
+    if utils.USE_SD_CARD:
+        unittest.main()
diff --git a/core/tests/test_trezor.sdcard.py b/core/tests/test_trezor.sdcard.py
index 3cfcfa8c0..851c4ae97 100644
--- a/core/tests/test_trezor.sdcard.py
+++ b/core/tests/test_trezor.sdcard.py
@@ -1,9 +1,9 @@
 from common import *
 
-from trezor import io, sdcard
+from trezor import io, sdcard, utils
 
-
-fatfs = io.fatfs
+if utils.USE_SD_CARD:
+    fatfs = io.fatfs
 
 
 class TestTrezorSdcard(unittest.TestCase):
@@ -89,4 +89,5 @@ class TestTrezorSdcard(unittest.TestCase):
 
 
 if __name__ == "__main__":
-    unittest.main()
+    if utils.USE_SD_CARD:
+        unittest.main()