diff --git a/R/FunctionReporter.R b/R/FunctionReporter.R
index fe9d952..3687ba2 100644
--- a/R/FunctionReporter.R
+++ b/R/FunctionReporter.R
@@ -153,7 +153,7 @@ FunctionReporter <- R6::R6Class(
 
             # workaround for covr conflict with loaded packages on windows
             if(.Platform$OS.type == "windows") {
-                detach(self$pkg_name, unload = TRUE)
+                detach(paste0('package:',self$pkg_name), unload = TRUE)
             }
 
             pkgCovDT <- data.table::as.data.table(covr::package_coverage(
@@ -166,7 +166,7 @@ FunctionReporter <- R6::R6Class(
 
             # workaround for covr conflict with loaded packages on windows
             if(.Platform$OS.type == "unix") {
-                loadNamespace(self$pkg_name)
+                loadNamespace(paste0('package:',self$pkg_name))
             }
 
             pkgCovDT <- pkgCovDT[, .(coveredLines = sum(value > 0)