diff --git a/maven-core-it/README.txt b/maven-core-it/README.txt
index 83e546896c..c9011036f4 100644
--- a/maven-core-it/README.txt
+++ b/maven-core-it/README.txt
@@ -244,9 +244,18 @@ it0088: Test path translation.
 
 it0089: Test that Checkstyle PackageNamesLoader.loadModuleFactory(..) method will complete as-is with
         the context classloader available to the plugin.
+       
+it0090: Test that ensures that envars are interpolated correctly into plugin
+        configurations.
+
+it0091: Test that currently demonstrates that properties are not correctly
+        interpolated into other areas in the POM. This may strictly be a boolean
+        problem: I captured the problem as it was reported.
 
 it0092: Test that legacy repositories with legacy snapshots download correctly.
 
+it0093: A test that ensures that an exception is thrown when two artifacts
+with the same id are present in the reactor.
 -------------------------------------------------------------------------------
 
 - generated sources
diff --git a/maven-core-it/it0093/a-one/pom.xml b/maven-core-it/it0093/a-one/pom.xml
new file mode 100644
index 0000000000..8217d8392e
--- /dev/null
+++ b/maven-core-it/it0093/a-one/pom.xml
@@ -0,0 +1,10 @@
+<model>
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.maven</groupId>
+    <artifactId>parent-it0092</artifactId>
+    <version>1.0</version>
+  </parent>
+  <groupId>it0093</groupId>
+  <artifactId>one</artifactId>
+</model>
diff --git a/maven-core-it/it0093/b-one/pom.xml b/maven-core-it/it0093/b-one/pom.xml
new file mode 100644
index 0000000000..8217d8392e
--- /dev/null
+++ b/maven-core-it/it0093/b-one/pom.xml
@@ -0,0 +1,10 @@
+<model>
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.maven</groupId>
+    <artifactId>parent-it0092</artifactId>
+    <version>1.0</version>
+  </parent>
+  <groupId>it0093</groupId>
+  <artifactId>one</artifactId>
+</model>
diff --git a/maven-core-it/it0093/expected-results.txt b/maven-core-it/it0093/expected-results.txt
new file mode 100644
index 0000000000..3e236aea44
--- /dev/null
+++ b/maven-core-it/it0093/expected-results.txt
@@ -0,0 +1,3 @@
+target/touch.txt
+!subproject/target/touch.txt
+subproject2/target/touch.txt
diff --git a/maven-core-it/it0093/goals.txt b/maven-core-it/it0093/goals.txt
new file mode 100644
index 0000000000..d737532567
--- /dev/null
+++ b/maven-core-it/it0093/goals.txt
@@ -0,0 +1 @@
+core-it:touch
diff --git a/maven-core-it/it0093/pom.xml b/maven-core-it/it0093/pom.xml
new file mode 100644
index 0000000000..466498abd7
--- /dev/null
+++ b/maven-core-it/it0093/pom.xml
@@ -0,0 +1,11 @@
+<model>
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.apache.maven</groupId>
+  <artifactId>parent-it0093</artifactId>
+  <packaging>pom</packaging>
+  <version>1.0</version>
+  <modules>
+    <module>a-one</module>
+    <module>b-one</module>
+  </modules>
+</model>