diff --git a/tests/common/test_imcversion.py b/tests/common/test_imcversion.py
index 0b835bd1..1b7764dc 100644
--- a/tests/common/test_imcversion.py
+++ b/tests/common/test_imcversion.py
@@ -40,9 +40,10 @@ def test_nightly_version2():
 
 
 def test_nightly_version3():
+    # 2.0(2cS6) will be considered as 2.0(2d) internally
     version1 = ImcVersion("2.0(2cS6)")
     version2 = ImcVersion("2.0(2c)")
-    assert_equal((version1 == version2), True)
+    assert_equal((version1 == version2), False)
 
 
 def test_nightly_version4():
@@ -51,6 +52,41 @@ def test_nightly_version4():
     assert_equal((version1 < version2), True)
 
 
+def test_spin_version1():
+    # version interpreted as 4.0(2b)
+    version1 = ImcVersion("4.0(2aS3)")
+    version2 = ImcVersion("4.0(2b)")
+    assert_equal((version1 == version2), True)
+
+
+def test_spin_version2():
+    # version interpreted as 4.0(234c)
+    version1 = ImcVersion("4.0(234bS3)")
+    version2 = ImcVersion("4.0(234c)")
+    assert_equal((version1 == version2), True)
+
+
+def test_spin_version3():
+    # version interpreted as 4.0(2z)
+    version1 = ImcVersion("4.0(2S3)")
+    version2 = ImcVersion("4.0(2z)")
+    assert_equal((version1 == version2), True)
+
+
+def test_spin_version4():
+    # version interpreted as 4.0(234z)
+    version1 = ImcVersion("4.0(234S3)")
+    version2 = ImcVersion("4.0(234z)")
+    assert_equal((version1 == version2), True)
+
+
+def test_patch_version1():
+    # version interpreted as 4.0(235a)
+    version1 = ImcVersion("4.0(234.5)")
+    version2 = ImcVersion("4.0(235a)")
+    assert_equal((version1 == version2), True)
+
+
 def test_gt_same_major_version():
     version1 = VersionMeta.Version151f
     version2 = VersionMeta.Version151x
@@ -64,9 +100,11 @@ def test_gt_different_major_version():
 
 
 def test_patch_versions():
+    # when we don't see a patch version we use z
+    # so 2.0(12) will be considerde as 2.0(12z)
     version1 = ImcVersion("2.0(12b)")
     version2 = ImcVersion("2.0(12)")
-    assert_equal((version1 > version2), True)
+    assert_equal((version1 > version2), False)
 
 
 def test_handle_version():