diff --git a/.travis.yml b/.travis.yml
index be6aed63..8386ab97 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,6 +22,7 @@ env:
   matrix:
     - SCALAJS_VERSION=
     - SCALAJS_VERSION=0.6.25
+    - SCALAJS_VERSION=1.0.0-M6
 
 script:
   - echo $JAVA_HOME
@@ -49,6 +50,10 @@ matrix:
   exclude:
     - jdk: openjdk11
       env: SCALAJS_VERSION=0.6.25
+    - jdk: openjdk11
+      env: SCALAJS_VERSION=1.0.0-M6
+    - scala: 2.11.12
+      env: SCALAJS_VERSION=1.0.0-M6
     - scala: 2.11.12
       jdk: oraclejdk8
     - scala: 2.11.12
diff --git a/build.sbt b/build.sbt
index cb75b228..01f765e6 100644
--- a/build.sbt
+++ b/build.sbt
@@ -14,7 +14,7 @@ lazy val `scala-parser-combinators` = crossProject(JSPlatform, JVMPlatform, Nati
   settings(
     name := "scala-parser-combinators",
     version := "1.1.2-SNAPSHOT",
-    mimaPreviousVersion := Some("1.1.0"),
+    mimaPreviousVersion := Some("1.1.0").filter(_ => System.getenv("SCALAJS_VERSION") != "1.0.0-M6"),
 
     apiMappings += (scalaInstance.value.libraryJar ->
         url(s"https://www.scala-lang.org/api/${scalaVersion.value}/")),