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diff --git a/test/bytecode_3.2/02_slice.pyc b/test/bytecode_3.2/02_slice.pyc
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diff --git a/test/bytecode_3.3/02_slice.pyc b/test/bytecode_3.3/02_slice.pyc
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diff --git a/test/bytecode_3.4/02_slice.pyc b/test/bytecode_3.4/02_slice.pyc
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diff --git a/test/bytecode_3.5/02_slice.pyc b/test/bytecode_3.5/02_slice.pyc
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diff --git a/test/bytecode_3.5_run/02_slice.pyc b/test/bytecode_3.5_run/02_slice.pyc
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diff --git a/test/bytecode_3.6_run/02_slice.pyc b/test/bytecode_3.6_run/02_slice.pyc
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diff --git a/test/simple_source/operation_logic/10_mixed_boolean.py b/test/simple_source/operation_logic/10_mixed_boolean.py
index aafd2c80..d1849cda 100644
--- a/test/simple_source/operation_logic/10_mixed_boolean.py
+++ b/test/simple_source/operation_logic/10_mixed_boolean.py
@@ -1,4 +1,6 @@
 # Self-checking test.
+# Mixed boolean expresions
+
 b = True
 assert b, 'b = True'
 c = False
diff --git a/test/simple_source/slice/02_slice.py b/test/simple_source/slice/02_slice.py
index 569626b6..917b3837 100644
--- a/test/simple_source/slice/02_slice.py
+++ b/test/simple_source/slice/02_slice.py
@@ -1,8 +1,15 @@
+# Self-checking test.
 # Tests of Python slice operators
 
 ary = [1,2,3,4,5]
+
 # Forces BUILD_SLICE 2 on 3.x
-ary[:2]
-ary[2:]
+a = ary[:2]
+assert a == [1, 2]
+
+a = ary[2:]
+assert a == [3, 4, 5]
+
 # Forces BUILD_SLICE 3
-ary[1:4:2]
+a = ary[1:4:2]
+assert a == [2, 4]