diff --git a/stix2/test/v20/test_attack_pattern.py b/stix2/test/v20/test_attack_pattern.py
index f071d3a..be291c5 100644
--- a/stix2/test/v20/test_attack_pattern.py
+++ b/stix2/test/v20/test_attack_pattern.py
@@ -25,7 +25,7 @@ EXPECTED = """{
 
 def test_attack_pattern_example():
     ap = stix2.v20.AttackPattern(
-        id="attack-pattern--0c7b5b88-8ff7-4a4d-aa9d-feb398cd0061",
+        id=ATTACK_PATTERN_ID,
         created="2016-05-12T08:17:27.000Z",
         modified="2016-05-12T08:17:27.000Z",
         name="Spear Phishing",
@@ -44,7 +44,7 @@ def test_attack_pattern_example():
         EXPECTED,
         {
             "type": "attack-pattern",
-            "id": "attack-pattern--0c7b5b88-8ff7-4a4d-aa9d-feb398cd0061",
+            "id": ATTACK_PATTERN_ID,
             "created": "2016-05-12T08:17:27.000Z",
             "modified": "2016-05-12T08:17:27.000Z",
             "description": "...",
@@ -74,7 +74,7 @@ def test_parse_attack_pattern(data):
 def test_attack_pattern_invalid_labels():
     with pytest.raises(stix2.exceptions.InvalidValueError):
         stix2.v20.AttackPattern(
-            id="attack-pattern--0c7b5b88-8ff7-4a4d-aa9d-feb398cd0061",
+            id=ATTACK_PATTERN_ID,
             created="2016-05-12T08:17:27Z",
             modified="2016-05-12T08:17:27Z",
             name="Spear Phishing",
diff --git a/stix2/test/v20/test_campaign.py b/stix2/test/v20/test_campaign.py
index 57dbfd2..746d560 100644
--- a/stix2/test/v20/test_campaign.py
+++ b/stix2/test/v20/test_campaign.py
@@ -5,7 +5,7 @@ import pytz
 
 import stix2
 
-from .constants import CAMPAIGN_ID
+from .constants import CAMPAIGN_ID, CAMPAIGN_MORE_KWARGS
 
 EXPECTED = """{
     "type": "campaign",
@@ -19,14 +19,7 @@ EXPECTED = """{
 
 
 def test_campaign_example():
-    campaign = stix2.v20.Campaign(
-        id="campaign--8e2e2d2b-17d4-4cbf-938f-98ee46b3cd3f",
-        created_by_ref="identity--f431f809-377b-45e0-aa1c-6a4751cae5ff",
-        created="2016-04-06T20:03:00Z",
-        modified="2016-04-06T20:03:00Z",
-        name="Green Group Attacks Against Finance",
-        description="Campaign by Green Group against a series of targets in the financial services sector.",
-    )
+    campaign = stix2.v20.Campaign(**CAMPAIGN_MORE_KWARGS)
 
     assert str(campaign) == EXPECTED
 
@@ -36,7 +29,7 @@ def test_campaign_example():
         EXPECTED,
         {
             "type": "campaign",
-            "id": "campaign--8e2e2d2b-17d4-4cbf-938f-98ee46b3cd3f",
+            "id": CAMPAIGN_ID,
             "created": "2016-04-06T20:03:00Z",
             "modified": "2016-04-06T20:03:00Z",
             "created_by_ref": "identity--f431f809-377b-45e0-aa1c-6a4751cae5ff",
diff --git a/stix2/test/v20/test_course_of_action.py b/stix2/test/v20/test_course_of_action.py
index d1c0fb7..3064e26 100644
--- a/stix2/test/v20/test_course_of_action.py
+++ b/stix2/test/v20/test_course_of_action.py
@@ -20,7 +20,7 @@ EXPECTED = """{
 
 def test_course_of_action_example():
     coa = stix2.v20.CourseOfAction(
-        id="course-of-action--8e2e2d2b-17d4-4cbf-938f-98ee46b3cd3f",
+        id=COURSE_OF_ACTION_ID,
         created_by_ref="identity--f431f809-377b-45e0-aa1c-6a4751cae5ff",
         created="2016-04-06T20:03:48.000Z",
         modified="2016-04-06T20:03:48.000Z",
diff --git a/stix2/test/v20/test_identity.py b/stix2/test/v20/test_identity.py
index 4a88a8a..750c6f2 100644
--- a/stix2/test/v20/test_identity.py
+++ b/stix2/test/v20/test_identity.py
@@ -19,7 +19,7 @@ EXPECTED = """{
 
 def test_identity_example():
     identity = stix2.v20.Identity(
-        id="identity--311b2d2d-f010-4473-83ec-1edf84858f4c",
+        id=IDENTITY_ID,
         created="2015-12-21T19:59:11.000Z",
         modified="2015-12-21T19:59:11.000Z",
         name="John Smith",
@@ -34,7 +34,7 @@ def test_identity_example():
         EXPECTED,
         {
             "created": "2015-12-21T19:59:11.000Z",
-            "id": "identity--311b2d2d-f010-4473-83ec-1edf84858f4c",
+            "id": IDENTITY_ID,
             "identity_class": "individual",
             "modified": "2015-12-21T19:59:11.000Z",
             "name": "John Smith",
diff --git a/stix2/test/v21/test_attack_pattern.py b/stix2/test/v21/test_attack_pattern.py
index 9c13a12..f0e88ee 100644
--- a/stix2/test/v21/test_attack_pattern.py
+++ b/stix2/test/v21/test_attack_pattern.py
@@ -26,7 +26,7 @@ EXPECTED = """{
 
 def test_attack_pattern_example():
     ap = stix2.v21.AttackPattern(
-        id="attack-pattern--0c7b5b88-8ff7-4a4d-aa9d-feb398cd0061",
+        id=ATTACK_PATTERN_ID,
         created="2016-05-12T08:17:27.000Z",
         modified="2016-05-12T08:17:27.000Z",
         name="Spear Phishing",
@@ -46,7 +46,7 @@ def test_attack_pattern_example():
         {
             "type": "attack-pattern",
             "spec_version": "2.1",
-            "id": "attack-pattern--0c7b5b88-8ff7-4a4d-aa9d-feb398cd0061",
+            "id": ATTACK_PATTERN_ID,
             "created": "2016-05-12T08:17:27.000Z",
             "modified": "2016-05-12T08:17:27.000Z",
             "description": "...",
@@ -77,7 +77,7 @@ def test_parse_attack_pattern(data):
 def test_attack_pattern_invalid_labels():
     with pytest.raises(stix2.exceptions.InvalidValueError):
         stix2.v21.AttackPattern(
-            id="attack-pattern--0c7b5b88-8ff7-4a4d-aa9d-feb398cd0061",
+            id=ATTACK_PATTERN_ID,
             created="2016-05-12T08:17:27Z",
             modified="2016-05-12T08:17:27Z",
             name="Spear Phishing",