diff --git a/tests/extmod/framebuf16.py b/tests/extmod/framebuf16.py
index e658f1345a..cd7f5ec015 100644
--- a/tests/extmod/framebuf16.py
+++ b/tests/extmod/framebuf16.py
@@ -1,9 +1,14 @@
 try:
-    import framebuf
+    import framebuf, usys
 except ImportError:
     print("SKIP")
     raise SystemExit
 
+# This test and its .exp file is based on a little-endian architecture.
+if usys.byteorder != "little":
+    print("SKIP")
+    raise SystemExit
+
 
 def printbuf():
     print("--8<--")
diff --git a/tests/extmod/framebuf_subclass.py b/tests/extmod/framebuf_subclass.py
index aad5d2a1e9..a9e3c5efc7 100644
--- a/tests/extmod/framebuf_subclass.py
+++ b/tests/extmod/framebuf_subclass.py
@@ -1,11 +1,16 @@
 # test subclassing framebuf.FrameBuffer
 
 try:
-    import framebuf
+    import framebuf, usys
 except ImportError:
     print("SKIP")
     raise SystemExit
 
+# This test and its .exp file is based on a little-endian architecture.
+if usys.byteorder != "little":
+    print("SKIP")
+    raise SystemExit
+
 
 class FB(framebuf.FrameBuffer):
     def __init__(self, n):
diff --git a/tests/float/bytearray_construct.py b/tests/float/bytearray_construct_endian.py
similarity index 100%
rename from tests/float/bytearray_construct.py
rename to tests/float/bytearray_construct_endian.py
diff --git a/tests/float/bytes_construct.py b/tests/float/bytes_construct_endian.py
similarity index 77%
rename from tests/float/bytes_construct.py
rename to tests/float/bytes_construct_endian.py
index 0806087b0e..208f56162f 100644
--- a/tests/float/bytes_construct.py
+++ b/tests/float/bytes_construct_endian.py
@@ -1,4 +1,4 @@
-# test construction of bytearray from array with float type
+# test construction of bytes from array with float type
 
 try:
     from uarray import array
diff --git a/tests/float/float_array.py b/tests/float/float_array.py
index 3c2189869b..219b6b86ae 100644
--- a/tests/float/float_array.py
+++ b/tests/float/float_array.py
@@ -22,4 +22,4 @@ def test(a):
 test(array("f"))
 test(array("d"))
 
-print("{:.4f}".format(array("f", b"\xcc\xcc\xcc=")[0]))
+print("{:.4f}".format(array("f", bytes(array("I", [0x3DCCCCCC])))[0]))