diff --git a/tests/pkg_libfixmath/do-test.py b/tests/pkg_libfixmath/do-test.py
index 2577a511c6..930e297097 100755
--- a/tests/pkg_libfixmath/do-test.py
+++ b/tests/pkg_libfixmath/do-test.py
@@ -78,12 +78,16 @@ def main():
             abs_error = abs(res_locals['result'] - float(res_locals['expected']))
             res_locals['result'] = '{:.4f}'.format(res_locals['result'])
             if abs_error > ABS_ERROR_LIMIT:
-                print('{}: {} != {}, {:.4f} > {}'.format(res_locals['input'], res_locals['result'], res_locals['expected'],
-                                                         abs_error, ABS_ERROR_LIMIT))
+                print('{}: {} != {}, {:.4f} > {}'.format(
+                    res_locals['input'],
+                    res_locals['result'],
+                    res_locals['expected'],
+                    abs_error,
+                    ABS_ERROR_LIMIT))
                 errors += 1
-        except:
+        except Exception as exc:
             errors += 1
-            print('ERROR {}'.format(line))
+            print('ERROR: {}: {}'.format(line, exc))
 
     print('{} calculations passed.'.format(total - errors))
     if errors:
diff --git a/tests/pkg_libfixmath/tests/01-run.py b/tests/pkg_libfixmath/tests/01-run.py
index 21e42d95fa..c68fe3b9ae 100755
--- a/tests/pkg_libfixmath/tests/01-run.py
+++ b/tests/pkg_libfixmath/tests/01-run.py
@@ -7,26 +7,26 @@ from testrunner import run, test_utils_interactive_sync
 def expect_unary(child):
     for _ in range(20):
         for op_name in ('abs', 'sq', 'atan', 'exp'):
-            child.expect('{}\(-?\d+\.\d+\) = -?\d+\.\d+'.format(op_name))
+            child.expect(r'{}\(-?\d+\.\d+\) = -?\d+\.\d+'.format(op_name))
 
     for _ in range(20):
         for op_name in ('sin', 'cos', 'tan'):
-            child.expect('{}\(-?\d+.\d+\) = -?\d+.\d+'.format(op_name))
+            child.expect(r'{}\(-?\d+.\d+\) = -?\d+.\d+'.format(op_name))
 
     for _ in range(20):
         for op_name in ('asin', 'acos'):
-            child.expect('{}\(-?\d+.\d+\) = -?\d+.\d+'.format(op_name))
+            child.expect(r'{}\(-?\d+.\d+\) = -?\d+.\d+'.format(op_name))
 
     for _ in range(20):
         for op_name in ('sqrt', 'log', 'log2', 'slog2'):
-            child.expect('{}\(-?\d+.\d+\) = -?\d+.\d+'.format(op_name))
+            child.expect(r'{}\(-?\d+.\d+\) = -?\d+.\d+'.format(op_name))
 
 
 def expect_binary(child):
     for _ in range(1500):
         for op_name in ('add', 'sub', 'mul', 'div', 'mod', 'sadd', 'ssub',
                         'smul', 'sdiv', 'min', 'max'):
-            child.expect('{}\(-?\d+.\d+\, -?\d+.\d+\) = -?\d+.\d+'
+            child.expect(r'{}\(-?\d+.\d+\, -?\d+.\d+\) = -?\d+.\d+'
                          .format(op_name))